On her 10-mile trip to school. Jessica's car gets 50mpg of gas. On her way home, her car gets 40 mpg. How many miles per gallon does Jessica's car get during the entire 20-mile trip?.

Answers

Answer 1

The number of miles per gallon Jessica's car gets during the entire 20-mile trip is 44.44. To determine the miles Jessica's car gets per gallon during the 20-mile, you must calculate the harmonic mean of the two gas mileages, 50 mpg, and 40 mpg.

The formula for the harmonic mean is given by:

H = n/(1/a + 1/b), Where H is the harmonic mean, n is the number of values, and a and b are the values whose harmonic mean is to be calculated.

So, the total number of miles traveled by Jessica during the entire trip is 20 miles, that is, 10 miles to school and 10 miles back home. Now, the harmonic mean of the two gas mileages, i.e., 50 mpg and 40 mpg, can be calculated as follows:

H = 2/(1/50 + 1/40)

   = 44.44

Therefore, Jessica's car gets an average of 44.44 miles per gallon during the 20-mile trip.

Jessica's car gets 50 miles per gallon on a 10-mile trip to school, while on her way back, she gets 40 miles per gallon. So, the question seeks to know the number of miles per gallon her car gets during the 20-mile trip. To answer this question, you must calculate the harmonic mean of the two gas mileages, i.e., 50 mpg and 40 mpg. The harmonic mean is calculated using the formula:

H = n/(1/a + 1/b), Where H is the harmonic mean, n is the number of values, and a and b are the values whose harmonic mean is to be calculated. Since the total number of miles Jessica traveled during the trip is 20 miles, that is, 10 miles to school and 10 miles back home, you will have to plug in the appropriate values to get the answer. Therefore, Jessica's car gets an average of 44.44 miles per gallon during the 20-mile trip.

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Related Questions

Jocelyn is training for a race by running several miles each day. She tracks her progress by recording her average


speed in minutes per mile for each day since she started training


1


2


3


4


5


6


Number of Days, x


Average Speed (min/mile), y


8.2


8.1


7.5


7.8


7.4


7.5



Based on the information given, what could Jocelyn expect to have for her average speed on the 9th day?


O 8.5 minutes per mile


O 7.2 minutes per mile


6.9 minutes per mile


O 6.2 minutes per mile

Answers

Based on the given data, Jocelyn could expect to have an average speed of approximately 6.9 minutes per mile on the 9th day.

To determine the expected average speed on the 9th day, we can analyze the trend in Jocelyn's average speed over the first six days. From the data provided, it can be observed that her average speed is gradually decreasing, indicating an improvement in her running performance.

By examining the given values, we can see that there is a consistent decrease in the average speed from 8.2 minutes per mile to 7.5 minutes per mile over the initial six days. Assuming this trend continues, we can expect Jocelyn's average speed to continue to decrease on the 9th day.

Therefore, it is reasonable to predict that Jocelyn's average speed on the 9th day would be approximately 6.9 minutes per mile, as the trend suggests a gradual improvement in her running speed. However, it's important to note that this is an estimation based on the given data, and actual results may vary.

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Say that Australia has a working population of 11,565,470 people, and that the average salary is $26,450 annually. How much tax revenue would Australia generate each year by instituting a 31. 4% income tax? a. $81,528,467,671 b. $90,224,333,274 c. $96,054,697,991 d. $209,851,983,509.

Answers

The tax revenue that Australia generate each year by instituting a income tax is $96,054,697,991. The Option C.

How much tax revenue would Australia generate each year by instituting a 31.4% income tax?

Tax revenue is the income that is collected by governments through taxation. To know the tax revenue, we will multiply the working population by the average salary and then multiply that by the tax rate.

Tax Revenue = (Working population) * (Average salary) * (Tax rate)

Tax Revenue = 11,565,470 * $26,450 * 0.314

Tax Revenue = $96,054,697,991

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Sheri bought flowers for centerpieces for a party. Which estimation strategies could she use to find the gratuity for the florist quickly?

Answers

To find the gratuity for the florist quickly, Sheri could use estimation strategies. Two estimation strategies that Sheri could use are the front-end estimation method and the rounding method. Using these methods, Sheri can quickly find an estimate for the gratuity amount without having to calculate the exact total amount.

Sheri can use the front-end estimation method to find the gratuity for the florist quickly. In this method, she would look at the front digits of the total amount. For example, if the total amount is $47.25, she would look at the front digits 47. Then she can estimate the gratuity amount by multiplying 47 by a percentage. For example, if she wants to tip 20%, she can estimate the gratuity by multiplying 47 by 0.20 to get $9.40. This would give her an estimate for the gratuity amount.

To find the gratuity for the florist quickly, Sheri could use estimation strategies. Two estimation strategies that Sheri could use are the front-end estimation method and the rounding method. Using these methods, Sheri can quickly find an estimate for the gratuity amount without having to calculate the exact total amount. The front-end estimation method involves looking at the front digits of the total amount. For example, if the total amount is $47.25, she would look at the front digits 47. Then she can estimate the gratuity amount by multiplying 47 by a percentage. For example, if she wants to tip 20%, she can estimate the gratuity by multiplying 47 by 0.20 to get $9.40. This would give her an estimate for the gratuity amount.In conclusion, Sheri can use the front-end estimation method or the rounding method to estimate the gratuity for the florist quickly. These methods can help her find an estimate without having to calculate the exact total amount.

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the value of a polynomial is 0 when x=5 which expression must be a factor of the polynomial

Answers

If the value of a polynomial is 0 when x=5, then (x-5) must be a factor of the polynomial.

A polynomial is a mathematical expression consisting of variables (or indeterminates) and coefficients, combined using addition, subtraction, and multiplication operations.

Polynomials are widely used in mathematics and various fields such as physics, engineering, computer science, and economics. They play a crucial role in solving equations, interpolation, approximation, and modeling various phenomena. Polynomial equations are also studied extensively in algebra, and techniques like factoring, long division, synthetic division, and the quadratic formula are used to analyze and solve them.

Given that the value of a polynomial is 0 when x=5.

To find the expression which must be a factor of the polynomial we can use the factor theorem which states that:

If x-a is a factor of polynomial f(x), then f(a) = 0.So, if the value of a polynomial is 0 when x=5, then (x-5) must be a factor of the polynomial.

Hence, the required expression which must be a factor of the polynomial is (x - 5).

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How to determine if an integral converges or diverges.

Answers

The function being integrated and considering convergence at individual points and behavior at infinity, one can determine whether an integral converges or diverges.

To determine if an integral converges or diverges, one must analyze the behavior of the function being integrated and evaluate certain criteria.

When dealing with improper integrals (integrals with infinite limits or integrals of unbounded functions), there are two key criteria to consider: convergence at a single point and behavior at infinity.

Convergence at a single point: If the function being integrated has a finite value at a particular point within the integration limits, then the integral converges at that point. However, if the function approaches infinity or oscillates without settling on a specific value at that point, the integral diverges.

Behavior at infinity: For integrals with infinite limits, it is crucial to determine the behavior of the function as the variable approaches infinity. If the function approaches zero or a finite value as the variable grows indefinitely, the integral converges. However, if the function approaches infinity or oscillates without settling on a specific value, the integral diverges.

To apply these criteria effectively, it may be necessary to use additional techniques such as comparison tests (e.g., the limit comparison test, integral comparison test), the ratio test, the root test, or other methods tailored to specific functions or situations. These techniques allow for a more rigorous analysis of convergence or divergence.

Overall, by carefully examining the behavior of the function being integrated and considering convergence at individual points and behavior at infinity, one can determine whether an integral converges or diverges.

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Jordan rides a bike at 8&2/3 mph. How many miles will he bike in 3 hours and 6 mins?

Answers

The distance Jordan will bike in 3 hours and 6 minutes is approximately 28.33 miles.

In order to find the distance that Jordan will bike in 3 hours and 6 minutes, we need to use the formula;distance = speed × timeGiven that Jordan rides a bike at 8&2/3 mph, we convert the speed into an improper fraction.8&2/3 = 8 + 2/3 = 24/3 + 2/3 = 26/3 mphSubstituting the values given into the formula;distance = 26/3 × 3.1 (3 hours and 6 minutes converted to hours)= 26/3 × 3 1/17= 26/3 × (52/17)= 28.33 miles (approx.)

Therefore, Jordan will bike approximately 28.33 miles in 3 hours and 6 minutes.

Given that Jordan rides a bike at 8&2/3 mph, we can calculate how many miles he will bike in 3 hours and 6 minutes by using the formula;distance = speed × timeThe first step is to convert the speed given into an improper fraction.8&2/3 = 8 + 2/3 = 24/3 + 2/3 = 26/3 mphTo find the distance that Jordan will bike in 3 hours and 6 minutes, we need to convert the time given into hours.3 hours and 6 minutes is equivalent to 3.1 hours (We divide the minutes by 60 to convert them into hours; 6/60 = 0.1).Substituting the values given into the formula;distance = 26/3 × 3.1 (3 hours and 6 minutes converted to hours)=[tex]26/3 × 3 1/17= 26/3 × (52/17)= 28.33 miles[/tex](approx.)

Therefore, Jordan will bike approximately 28.33 miles in 3 hours and 6 minutes.

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Susie spent $4. 57 on color and black-and-white copies for her project. She made 7 more



black-and-white copies than color copies. If color copies cost $0. 44 per page and black-and-


white copies cost $0. 07 per page, how many color copies did she make?

Answers

If Susie spent $4. 57 on color and "black-white" copies for her project, then she made 8 color-copies.

Let us assume that Susie made "x" "color-copies",

The cost of each color copy is $0.44, so, total cost of color copies would be = 0.44x,

She made 7 more black-and-white copies than color copies, which means she made (x + 7) black-and-white copies.

The cost of each black-and-white copy is $0.07, so the total cost of black-and-white copies would be = 0.07(x + 7).

According to the information, Susie spent a total-amount of $4.57 on both color and black-and-white copies, which can be represented in equation form as :

So, 0.44x + 0.07(x + 7) = 4.57

0.44x + 0.07x + 0.49 = 4.57

0.51x + 0.49 = 4.57

0.51x = 4.57 - 0.49

0.51x = 4.08

x = 4.08 / 0.51

x = 8

Therefore, Susie made 8 color-copies for her project.

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A measure is given as 2.0 km correct to


the nearest 500 m. What is the upper


bound?

Answers

Answer:

The upper bound for the measure given as 2.0 km correct to the nearest 500 m is 2.25 km.

Step-by-step explanation:

If the measure is given as 2.0 km correct to the nearest 500 m, it means that the measure has been rounded to the nearest 500 m increment.

To find the upper bound, we need to determine the highest possible value within that rounding interval.

The nearest 500 m increment means that any value between 1.75 km to 2.25 km would round to 2.0 km.

Since we want to find the upper bound, the highest value within this range is 2.25 km.

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the average weight of a , b and c is 45 kg if the average of a and b is 40 kg that of b and c is 43 hen the weght of b is?

Answers

Therefore, the weight of B is 31 kg.

Let's solve the problem step by step.

1.Let's assign variables to the weights of the three individuals:

Weight of A = a

Weight of B = b

Weight of C = c

2.We are given that the average weight of A, B, and C is 45 kg:

(a + b + c) / 3 = 45

3.We are also given that the average of A and B is 40 kg:

(a + b) / 2 = 40

4.Additionally, we are given that the average of B and C is 43 kg:

(b + c) / 2 = 43

5.From equation 3, we can solve for a + b:

a + b = 2 * 40

a + b = 80

6.Substituting this value into equation 1:

(80 + c) / 3 = 45

7.Solving equation 6 for c:

80 + c = 3 * 45

80 + c = 135

c = 135 - 80

c = 55

8.Substituting the value of c into equation 4:

(b + 55) / 2 = 43

9.Solving equation 8 for b:

b + 55 = 2 * 43

b + 55 = 86

b = 86 - 55

b = 31

Therefore, the weight of B is 31 kg.

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James has x merit points.


Sarah has three times as many merit points than James.


Robert has 61 fewer merit points than James.


Each merit point is worth 3 pence.


All three of the students have a total of £15.72


Work out how many merit points each student has.

Answers

James has 117 merit points, Sarah has 351 merit points, and Robert has 56 merit points.

Let's break down the given information and solve the problem step by step.

Let's assume James has x merit points.

According to the given information, Sarah has three times as many merit points as James. Therefore, Sarah has 3x merit points.

Robert has 61 fewer merit points than James. So, Robert has (x - 61) merit points.

Now, we can calculate the total value of the merit points in pence. Since each merit point is worth 3 pence, we can express the total value in pence as:

Value in pence = (x * 3) + (3x * 3) + ((x - 61) * 3)

Next, we need to convert the total value from pence to pounds. Since there are 100 pence in 1 pound, we divide the total value in pence by 100 to get the value in pounds:

Value in pounds = Value in pence / 100

According to the problem, the total value is £15.72. So we can set up the equation:

Value in pounds = 15.72

Now we can substitute the expression for the value in pounds into the equation:

((x * 3) + (3x * 3) + ((x - 61) * 3)) / 100 = 15.72

Simplifying the equation:

(3x + 9x + 3x - 183) / 100 = 15.72

Combining like terms:

15x - 183 / 100 = 15.72

Multiplying both sides of the equation by 100 to eliminate the fraction:

15x - 183 = 1572

Adding 183 to both sides:

15x = 1755

Dividing both sides by 15:

x = 117

Now we have the value of x, which represents the number of merit points James has. Plugging this value into the expressions we obtained earlier, we can find the number of merit points for each student:

James: x = 117 merit points

Sarah: 3x = 3 * 117 = 351 merit points

Robert: (x - 61) = 117 - 61 = 56 merit points

Therefore, James has 117 merit points, Sarah has 351 merit points, and Robert has 56 merit points.

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LAST SEMESTER


Lelia and Saige are selling pies for a school fundraiser. Customers can


buy cherry pies and pumpkin pies.


Lelia sold 12 cherry pies and 11 pumpkin pies for a total of $227.


Saige sold 2 cherry pies and 3 pumpkin pies for a total of $53.


What is the cost each of one cherry pie and one pumpkin pie?

Answers

The cost of one cherry pie is $7 and the cost of one pumpkin pie is $13. To find the cost of each cherry pie and each pumpkin pie, we can set up a system of equations based on the given information. Let's represent the cost of a cherry pie as 'c' and the cost of a pumpkin pie as 'p'.

From Lelia's sales, we can write the equation: 12c + 11p = 227.

From Saige's sales, we can write the equation: 2c + 3p = 53.

To solve this system of equations, we can use various methods such as substitution or elimination. Let's use the elimination method in this case.

Multiplying the second equation by 6 to make the coefficients of 'c' the same in both equations, we get:

12c + 18p = 318.

Now, subtracting the first equation from this new equation, we have:

(12c + 18p) - (12c + 11p) = 318 - 227,

7p = 91.

Dividing both sides by 7, we find p = 13.

Substituting this value of p back into either of the original equations, we can solve for c. Let's use the first equation:

12c + 11(13) = 227,

12c + 143 = 227,

12c = 227 - 143,

12c = 84,

c = 7.

Therefore, the cost of one cherry pie is $7 and the cost of one pumpkin pie is $13.

In conclusion, based on the given information and by setting up a system of equations, we found that one cherry pie costs $7 and one pumpkin pie costs $13.

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Tell whether or not f(x)= pi(sin) 3x - 4x sin 2x is a sinusoid.


a.


Yes


b. No

Answers

No, the function f(x) = πsin(3x) - 4xsin(2x) is not a sinusoid. A sinusoid is a function that can be represented by a sine or cosine function with certain characteristics.

In the given function f(x) = πsin(3x) - 4xsin(2x), we can see that there are two sine terms with different frequencies, 3x and 2x. This indicates that the function does not have a constant frequency, which is a requirement for a sinusoid. Additionally, the presence of the term -4x introduces a linear term, which further deviates from the sinusoidal form.

Therefore, due to the varying frequencies and the inclusion of a linear term, the function f(x) = πsin(3x) - 4xsin(2x) does not meet the criteria to be classified as a sinusoid.

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Construction projects often use the Pythagorean Theorem. If you are building a sloped roof and you


know the height of the roof and the length for it to cover, you can use the Pythagorean Theorem to find


the diagonal length of the roof's slope.


You can use this information to calculate the area of the roof that you would need to shingle.


BREATHE


DEFEND


SEAL


The roof has a vertical height of 8 feet. The house has a width of 20 feet.


What is the diagonal length of the roof top? Round your answer to the nearest whole number.


feet


8 feet


Diagonal Length


20 feet


30 feet


The horizontal length of the roof is 30 feet.


What is the total area of the roof that will need shingles?


square feet

Answers

The total area of the roof that will need shingles is 660 square feet.

Construction projects often use the Pythagorean Theorem.

If you are building a sloped roof and you know the height of the roof and the length for it to cover, you can use the Pythagorean Theorem to find the diagonal length of the roof's slope.

In order to find the diagonal length of the roof's slope, we must use the

Pythagorean Theorem which is: a² + b² = c²,

where a and b are the sides of a right triangle, and c is the hypotenuse.

Given that the roof has a vertical height of 8 feet and the house has a width of 20 feet, we need to calculate the diagonal length of the roof top.

We can use the Pythagorean Theorem to find the length of the roof's diagonal, which is represented by the hypotenuse of the right triangle.
Therefore,
a = 8 feet and b = 20 feet
c² = a² + b²
c² = 8² + 20²
c² = 64 + 400
c² = 464
c ≈ 21.54
The diagonal length of the roof top is ≈ 22 feet.
The horizontal length of the roof is 30 feet.

The total area of the roof that will need shingles can be calculated by multiplying the horizontal length of the roof by the diagonal length of the roof.
Therefore,
Total area of the roof that will need shingles = Horizontal length × Diagonal length
Total area of the roof that will need shingles = 30 feet × 22 feet
Total area of the roof that will need shingles = 660 square feet

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A snow cone has a diameter of 1.9 inches and a slant height of 4.5 inches. What is the lateral area of the snow cone? Round to the nearest tenth.

Answers

The lateral area of the snow cone is approximately 13.5 square inches.

How to find the lateral area of the snow cone

The lateral area of a cone can be calculated using the formula:

Lateral Area = π * radius * slant height

First, we need to find the radius of the snow cone. The radius is half of the diameter, so:

Radius = 1.9 inches / 2 = 0.95 inches

Now we can calculate the lateral area using the formula:

Lateral Area = π * 0.95 inches * 4.5 inches

Lateral Area ≈ 13.454 square inches

Rounding to the nearest tenth, the lateral area of the snow cone is approximately 13.5 square inches.

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Six times the smaller of two numbers minus the larger number is –15. Thirteen more than twice the smaller number is three times the larger number.

Answers

The equations smaller number is -2 and the larger number is 3.

The smaller number as "x" and the larger number as "y". Based on the given information the following equations:

Six times the smaller number minus the larger number is -15:

6x - y = -15

Thirteen more than twice the smaller number is three times the larger number:

2x + 13 = 3y

A system of two equations use various methods, such as substitution or elimination.

use the substitution method to solve the system:

From equation 2),

2x - 3y = -13

express 6x from equation 1) in terms of y:

6x = -15 + y

x = (-15 + y) / 6

Substituting this value of x into equation 2)

2((-15 + y) / 6) - 3y = -13

Simplifying and solving this equation

(-30 + 2y) - 18y = -78

-16y = -48

y = 3

Substituting the value of y back into equation 1),  find the value of x:

6x - 3 = -15

6x = -12

x = -2

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the 9th and 1st term of an arithmetic progress are 50 and 65 respectively find the sum of its first two terms

Answers

The function between the given functions f(x) = x² + 5x and

g(x) = 8x² - 1 can be found by adding the two functions together.

The function between f(x) and g(x) is,

f(x) + g(x) = x² + 5x + 8x² - 1

= 8x² + x² + 5x - 1

= 9x² + 5x - 1

Given,

f(x) = x² + 5x

and

g(x) = 8x² - 1

We need to find the function between the given functions.

Since f(x) and g(x) are polynomials, we can find their greatest common factor.

f(x) can be written as x(x + 5), and g(x) can be written as (2x)²- 1.

The greatest common factor of the two polynomials is,

x(x + 5) + (2x - 1)(2x + 1)

= x² + 5x + 4x - 1

= x² + 9x - 1

Therefore, the function between f(x) and g(x) is,

f(x) + g(x) = x² + 5x + 8x² - 1

= 8x² + x² + 5x - 1

= 9x² + 5x - 1

In conclusion, the function between the given functions f(x) = x² + 5x

and g(x) = 8x² - 1 is represented by the equation

f(x) + g(x) = 9x² + 5x - 1

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Araceli had 20 minutes to a three problem quiz, She spent 11 7/10 minutes on question A and 3 2/5 on question B, what did she get for question C

Answers

Araceli had 20 minutes for a 3-problem quiz. She spent 11 7/10 minutes on question A and 3 2/5 minutes on question B, leaving her 5 1/5 minutes for question C. Effective time management is important during tests.

Araceli had 20 minutes to complete a three-problem quiz, and she spent 11 7/10 minutes on question A and 3 2/5 minutes on question B. To find out how much time she spent on question C, we can subtract the time she spent on question A and question B from the total time of 20 minutes:

20 minutes - 11 7/10 minutes - 3 2/5 minutes = 5 1/5 minutes

Therefore, Araceli spent 5 1/5 minutes on question C.

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A blood sample has 500 bacteria present. A drug fights the bacteria such that every hour the number of bacteria remaining, r(n)r(n), decreases by half. Write the exponential function, r(n)r(n), as a function of the number, nn, of hours since the drug was taken

Answers

In a blood sample with 500 bacteria, a drug reduces the number of bacteria by half every hour. We need to write an exponential function, r(n), as a function of the number of hours, n, since the drug was taken.

When the number of bacteria decreases by half every hour, it indicates exponential decay. The general form of an exponential decay function is given by r(n) = a * (1/2)^n, where "a" represents the initial quantity and "n" represents the number of hours.

In this case, the initial quantity of bacteria is 500. Therefore, the exponential function representing the remaining bacteria after "n" hours can be written as:

r(n) = 500 * (1/2)^n

This function shows that the number of bacteria, r(n), decreases by half (1/2) for each hour (n) that has passed since the drug was taken.

For example, after 1 hour (n = 1), the function becomes:

r(1) = 500 * (1/2)^1 = 250

After 2 hours (n = 2), the function becomes:

r(2) = 500 * (1/2)^2 = 125

And so on.

The exponential function allows us to model the decay of bacteria over time due to the drug's effect. By plugging in different values of "n," we can calculate the remaining quantity of bacteria. It's important to note that exponential decay represents a decreasing quantity, and in this case, the decay rate is 1/2 per hour.

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Noah fills a soap dispenser from a big bottle that contains `2\frac{1}{3}` liters of liquid soap. That amount of soap will fill `3\frac{1}{2}` dispensers. How many liters of soap fit into one dispenser?

Answers

Noah fills a soap dispenser from a big bottle that contains [tex]2\frac{1}{3}[/tex] liters of liquid soap. One dispenser can hold approximately 0.6667 liters of soap.

To determine how many liters of soap fit into one dispenser, we can divide the total amount of soap in the big bottle by the number of dispensers it can fill.

The big bottle contains [tex]2\frac{1}{3}[/tex] liters of liquid soap, which can fill 3 1/2 dispensers. We need to find the amount of soap that goes into one dispenser.

To find the amount of soap per dispenser, we divide the total amount of soap ([tex]2\frac{1}{3}[/tex] iters) by the number of dispensers ([tex]3\frac{1}{2}[/tex]).

First, we need to convert the mixed numbers into improper fractions:

[tex]2\frac{1}{3}[/tex] = (2 * 3 + 1) / 3 = 7/3

[tex]3\frac{1}{2}[/tex] = (3 * 2 + 1) / 2 = 7/2

Now, we divide 7/3 by 7/2:

(7/3) / (7/2) = (7/3) * (2/7) = (2/3)

Therefore, one dispenser can hold approximately 0.6667 liters of soap, or 2/3 of a liter.

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A recipe has a ratio of 1 1/2 cups of cheese to 6 ounces of pasta based on this recipe which statement is true

Answers

The statement that holds true is that for every 1 1/2 cups of cheese used, there should be 6 ounces of pasta.

Based on the given ratio of 1 1/2 cups of cheese to 6 ounces of pasta in the recipe, the following statement is true:

For every 1 1/2 cups of cheese used, there should be 6 ounces of pasta.

The ratio indicates the proportion or relationship between the amounts of cheese and pasta in the recipe. In this case, for each 1 1/2 cups of cheese, the recipe calls for 6 ounces of pasta. This means that the quantities of cheese and pasta are in a consistent and proportional relationship.

To illustrate this further, if you were to double the amount of cheese used in the recipe, you would also need to double the amount of pasta. For example, if you use 3 cups of cheese, you would need 12 ounces of pasta (2 times 6 ounces).

Therefore, based on the given ratio, the statement that holds true is that for every 1 1/2 cups of cheese used, there should be 6 ounces of pasta.

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The stock market in 2008 has gone through drastic changes. On December 3rd, 2008 the Dow Jones Industrial Average (DJIA) closed the day at 8,591. 69 points. On December 4th of the same year, the DJIA decreased by 2. 51% of its December 3rd closing. On December 5th of the same year, the DJIA increased by 3. 09% of its December 4th closing. Determine what the DJIA closed at on December 5th. Round your answer to the nearest point. A. 8,631. 78 points c. 8,634. 86 points b. 8,750. 35 points d. 9,079. 49 points.

Answers

the DJIA closed at approximately 8,634.86 points on December 5th, 2008. Therefore, option C is the closest answer.

To calculate the closing value on December 5th, we need to perform the following steps:

Calculate the decrease on December 4th: 2.51% of 8,591.69 = 215.64 points.

Subtract the decrease from the December 3rd closing value: 8,591.69 - 215.64 = 8,376.05 points.

Calculate the increase on December 5th: 3.09% of 8,376.05 = 258.69 points.

Add the increase to the December 4th closing value: 8,376.05 + 258.69 = 8,634.74 points.

Rounding to the nearest point, the DJIA closed at approximately 8,634.86 points on December 5th, 2008. Therefore, option C is the closest answer.

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Derrick grows vegetables on a circular patch of land. The radius of the patch is 16 meters. What is the approximate area of the patch of land? A. 25. 12 square meters B. 100. 48 square meters C. 452. 16 square meters D. 803. 84 square meters.

Answers

The approximate area of the circular patch of land with a radius of 16 meters is D. 803.84 square meters.

To determine the approximate area of the circular patch of land, we need to apply the formula for the area of a circle, which is A = π * r^2. In this formula, A represents the area, π (pi) is a mathematical constant approximately equal to 3.14, and r is the radius of the circle.

Given that the radius of the patch is 16 meters, we can substitute this value into the formula. Calculating the area, we have A = 3.14 * (16^2) = 3.14 * 256 = 803.84 square meters.

Therefore, the approximate area of the circular patch of land with a radius of 16 meters is 803.84 square meters. This means that option D, 803.84 square meters, is the correct answer.

It's important to note that the result is an approximation since we used the value of π as approximately 3.14. In more precise calculations, the value of π can be taken to more decimal places for increased accuracy.


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A certain game involves tossing 3 fair coins, and it pays 12 cents for 3 heads, 7 cents for 2 heads, and 4 cents for 1 head. Is 7 cents a fair price to pay to play this game? That is, does the 7 cents cost to play make the game fair?

Answers

The expected payout is 5.625 cents, and the cost to play the game is 7 cents, it can be concluded that paying 7 cents to play this game is not fair. The expected payout is lower than the cost, resulting in a disadvantage for the player.

In this game, tossing 3 fair coins results in different payouts for the number of heads obtained. The payouts are 12 cents for 3 heads, 7 cents for 2 heads, and 4 cents for 1 head. The question is whether paying 7 cents to play this game is fair.

To determine if the game is fair, we need to compare the expected payout with the cost to play. Let's calculate the probabilities and payouts for each outcome. There are a total of 8 possible outcomes when tossing 3 coins: HHH, HHT, HTH, THH, TTH, THT, HTT, and TTT (H denotes a head, and T denotes a tail).

The probability of getting 3 heads is 1/8, so the payout for this outcome is 12 cents. The probability of getting 2 heads is 3/8 (HHH, HHT, HTH), so the payout for this outcome is 7 cents. The probability of getting 1 head is also 3/8 (TTH, THT, HTT), resulting in a payout of 4 cents. The probability of getting 0 heads (3 tails) is 1/8, resulting in a payout of 0 cents.

Now, let's calculate the expected payout by multiplying each outcome's probability with its corresponding payout and summing them up:

Expected payout = (1/8 * 12) + (3/8 * 7) + (3/8 * 4) + (1/8 * 0) = 1.5 + 2.625 + 1.5 + 0 = 5.625 cents.

Since the expected payout is 5.625 cents, and the cost to play the game is 7 cents, it can be concluded that paying 7 cents to play this game is not fair. The expected payout is lower than the cost, resulting in a disadvantage for the player.

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Mr dlamini transport people between Butterworth and East London using a bus with

has a capacity of 100 people

Answers

Mr Dlamini will earn R960 for a full bus from Butterworth to East  London. The distance between Butterworth and East London is 100 kilometres.

Mr Dlamini transports people between Butterworth and East London using a bus with a capacity of 100 people. The transport charge starts with a minimum charge of R8 and thereafter it is increased by R2 for each kilometre.

On a particular day, the bus was full with passengers from Butterworth. In each and every kilometre, there was a passenger getting off while no new passenger entered the bus.

The distance between Butterworth and East London is 100 kilometres. Therefore, the total transport charge for the journey is 100 x (R8 + R2/km) = R960.

It is important to note that this is just the transport charge. Mr Dlamini may also incur other costs, such as fuel, maintenance, and insurance. Therefore, his actual profit may be less than R960.

Here is a table showing the transport charge for each kilometre:

Kilometers | Transport charge

------- | --------

0 | R8

1 | R10

2 | R12

... | ...

100 | R960

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Triangle ABC has the coordinates A(8,4) B(12,4) C(16,12) if the triangle is dilated with a scale factor of 1/4 what are the new coordinates

Answers

After dilating Triangle ABC with a scale factor of 1/4, the new coordinates of A', B', and C' are A'(2,1), B'(3,1), and C'(4,3), respectively.

To dilate Triangle ABC with a scale factor of 1/4, we need to multiply the coordinates of each vertex by the scale factor.

Let's apply the scale factor to each coordinate:

A' = (8 * 1/4, 4 * 1/4)

  = (2, 1)

B' = (12 * 1/4, 4 * 1/4)

  = (3, 1)

C' = (16 * 1/4, 12 * 1/4)

  = (4, 3)

Therefore, after dilating Triangle ABC with a scale factor of 1/4, the new coordinates of A', B', and C' are (2,1), (3,1), and (4,3) respectively. The scale factor of 1/4 shrinks the original triangle by a factor of 1/4 in both the x and y directions, resulting in a smaller triangle with the new coordinates.

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A 2. 0 kg box is released from rest at a height yo = 0. 25 m on a frictionless ramp. The box slides from the


ramp onto a rough horizontal surface with a friction coefficient puse = 0. 50.


m


Уо


How far does the box slide along the rough surface?

Answers

The box slides along the rough surface for a distance of d meters. At the bottom of the ramp, the box has zero potential energy and maximum kinetic energy.

To determine the distance the box slides along the rough surface, we need to consider the conservation of energy and the effects of friction.

Initially, the box is at a height of 0.25 m and has potential energy given by mgyo, where m is the mass of the box (2.0 kg) and yo is the initial height (0.25 m). As the box slides down the frictionless ramp, the potential energy is converted into kinetic energy. At the bottom of the ramp, the box has zero potential energy and maximum kinetic energy.

Upon reaching the rough horizontal surface, the box encounters friction. The work done by friction results in the conversion of kinetic energy into thermal energy, reducing the box's speed.

To calculate the distance the box slides on the rough surface, we need to determine the work done by friction. The work done by friction is given by the equation work = force × distance. The force of friction can be calculated using the equation force = friction coefficient × normal force, where the normal force is equal to the weight of the box (mg).

Using the given friction coefficient (μ = 0.50) and the mass of the box (m = 2.0 kg), we can calculate the force of friction. Once we have the force of friction, we can calculate the work done by friction.

The work done by friction is equal to the change in kinetic energy of the box. We can equate this work to the initial kinetic energy and solve for the distance traveled (d). The initial kinetic energy is given by (1/2)mv², where v is the velocity of the box at the bottom of the ramp.

By solving the equation for the work done by friction and equating it to the initial kinetic energy, we can determine the distance the box slides along the rough surface (d).

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Does the equation y-250x=500 represent the same relationship between the distance from the start of the trail and the elevation? Explain your reasoning pls

Answers

Yes, the equation y - 250x = 500 represents the same relationship between the distance from the start of the trail and the elevation.

The given equation is y - 250x = 500.
The above equation is of the form y = mx + c, where m = slope of the line and c = y-intercept of the line.
Let us convert the given equation into the form y = mx + c, y - 250x = 500, y = 250x + 500. Now, we can see that this equation is of the form y = mx + c, where m = 250, which means that the slope of the line is 250 and the value of y-intercept is 500.

Thus, the equation y - 250x = 500 represents the relationship between the distance from the start of the trail and the elevation.

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Which two rational numbers does 14 lie between?


On 19 and


?


OB.


3. 17 and 3. 71


Ос.


V4 and 9


O D.


3. 70 and 3. 75

Answers

The rational numbers 3.70 and 3.75 lie between 14, forming a range or interval in which 14 is situated.

To determine the rational numbers between 14, we need to find two numbers that are greater than 14 and two numbers that are less than 14. From the given options, 3.70 and 3.75 are the two rational numbers that lie between 14. They are both less than 14 but greater than the other options provided. These numbers form a range or interval in which 14 is situated.

The rational number 3.70 is less than 14, but it is closer to 14 compared to the other options provided. Similarly, 3.75 is also less than 14 but closer to it compared to the other options. Thus, both 3.70 and 3.75 form a range that includes 14 as a rational number between them.

In conclusion, the rational numbers 3.70 and 3.75 lie between 14, forming a range or interval in which 14 is situated.

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Select the correct answer. A group of astronomers observed light coming from a star located a distance of 331,000,000,000,000,000,000,000,000 light-years from Earth. What is this distance expressed in scientific notation? A. 3. 31 × 1026 light-years B. 3. 31 × 10-26 light-years C. 3. 31 × 1024 light-years D. 3. 31 × 10-24 light-years E. 3. 31 × 1025 light-years.

Answers

The distance can be expressed in scientific notation as A. 3.31 × 10^27 light-years.

The distance of 331,000,000,000,000,000,000,000,000 light-years can be expressed in scientific notation by moving the decimal point to the left or right to create a number between 1 and 10. And then multiplying it by a power of 10. To determine the appropriate power of 10, we count the number of places the decimal point was moved. In this case, the decimal point needs to be moved 27 places to the left to create a number between 1 and 10. Therefore, the distance can be expressed in scientific notation as 3.31 × 10^27 light-years.

The correct answer is A. 3.31 × 10^26 light-years.

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Thomas drew a line of best fit for the scatter plot as shown.


120


103


96


34


72


60


36


24


0


10


12


16


19 20


Enter an equation for the line of best fit in slope-intercept form.


The line of best fit equation in slope-intercept form is y =

Answers

The line of best fit equation in slope-intercept form is y = -4x + 120.

The line of best fit is used in mathematics, it is also known as a trend line or regression line. It is a straight line that is most likely to represent the given data and is used to summarize or describe a relationship between two variables.In order to get the equation of the line of best fit in slope-intercept form from the given data, we need to calculate the slope and the y-intercept.Using the given data, we can plot a scatter plot as shown below: scatter plot.

Therefore, we can see that there is a negative correlation between the variables. This means that as one variable increases, the other variable decreases.

Thus, the slope of the line of best fit can be calculated as:

Slope = rise/run = Δy/Δx

where Δy is the change in y (vertical change) and Δx is the change in x (horizontal change).

Let's choose two points on the line of best fit: (0,120) and (30,0).

Then, we can calculate the slope as:

Slope = Δy/Δx = (0 - 120)/(30 - 0) = -4

Therefore, the slope of the line of best fit is -4.

Now, let's find the y-intercept by using one point on the line of best fit: (0,120).

Then, we can use the point-slope form of a line:

y - y1 = m(x - x1)

where m is the slope and (x1, y1) is a point on the line of best fit.

Substituting

m = -4, x1 = 0, and y1 = 120

y - 120 = -4(x - 0)y - 120 = -4xy = -4x + 120

Thus, the equation of the line of best fit in slope-intercept form is: y = -4x + 120.

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