What is 1/10 The value of the digit 4 in the number 912. 43

Sandra will receive a refund of $1,290 from the Internal Revenue Service. She wants to know how much she will receive as a refund from the Internal Revenue Service (IRS).

It is an agency under the U.S. Department of the Treasury. The amount of Sandra will receive as a refund is calculated as follows: Her total federal tax owed is calculated as a percentage of her taxable income. For the 2019 tax year, the percentage tax rates for single filers are as follows:10% on taxable income from $0 to $9,700,12% on taxable income over $9,700 to $39,475, and 22% on taxable income over $39,475 to $84,200. Sandra's taxable income is within the 12% tax bracket.

She owes 12% of her taxable income in federal taxes. This can be calculated as follows:

12% x $39,250 = $4,710

Her total federal tax owed is $4,710. However, she already paid $6,000 in federal withholding tax. Therefore, her refund can be calculated as follows:

Refund = Amount withheld - Amount owed Refund

= $6,000 - $4,710

Refund = $1,290

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The length of SR in the trapezoid formed by the given points is approximately 13.42 units when rounded to the nearest hundredth.

To find the length of SR in the trapezoid formed by the points P (-3, 5), Q (1, 7), R (8, 1), and S (-4, -5), we can use the distance formula. The distance formula calculates the distance between two points in a coordinate plane.

The distance formula is given by:

d = sqrt((x2 - x1)^2 + (y2 - y1)^2)

Let's calculate the length of SR using the coordinates of points S and R:

x1 = -4, y1 = -5 (coordinates of S)

x2 = 8, y2 = 1 (coordinates of R)

Using the distance formula, we have:

d = sqrt((8 - (-4))^2 + (1 - (-5))^2)

= sqrt(12^2 + 6^2)

= sqrt(144 + 36)

= sqrt(180)

≈ 13.42

Therefore, the length of SR in the trapezoid formed by the given points is approximately 13.42 units when rounded to the nearest hundredth.

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The coordinates of point M is located between lines d and e

From the question, we have the following parameters that can be used in our computation:

M = (3 1/2, 1)

The above means that the x and the y coordinates of M are

x = 3 1/2 and y = 1

From the attached figure, we can see that

The point M with the given coordinates is located between lines d and e

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Question

Miley will place point m at the coordinate (3 1/2, 1) on the coordinate grid below

Point M will be between which 2 lines

The expression -12 + 10c consists of two terms: -12 and 10c. The coefficient of the variable term 10c is 10, and the constant term is -12.

In the expression -12 + 10c, we can identify the terms, coefficients, and constants as follows:

Terms:

A term is a combination of a constant and a variable, separated by an operation (usually addition or subtraction). In this expression, we have two terms: -12 and 10c.

Term 1: -12

Term 2: 10c

Coefficients:

The coefficient of a term is the numerical factor that multiplies the variable. In this expression, the coefficient of the second term (10c) is 10.

Coefficient of 10c: 10

Constants:

A constant is a term that does not contain any variable. In this expression, the constant term is -12.

Constant: -12

To summarize:

Terms:

Term 1: -12

Term 2: 10c

Coefficients:

Coefficient of 10c: 10

Constants:

Constant: -12

It's important to distinguish between terms, coefficients, and constants as they provide information about the components of the expression and their respective roles.

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Equations of vertical lines are those in which there is no change in the horizontal direction, i.e., parallel to the y-axis. The equation is always x = a, where a is any constant.

For example, x = 3, x = 2, etc. Let's check the given options:A. x - y = 0 can be rewritten as x = y. This is not a vertical line equation.B. Ox + 2y = 2 can be rewritten as 2y = - Ox + 2 or y = - (O/2)x + 1. This is not a vertical line equation.C. 3x + Oy = 7 can be rewritten as 3x = 7 - Oy or x = (7 - Oy)/3. This is not a vertical line equation.D. 2x - y = 2 can be rewritten as y = 2x - 2. This is not a vertical line equation.E. x + Oy = 7 can be rewritten as y = (7 - x)/O. This is not a vertical line equation.F. Ox + 4y = 8 can be rewritten as Ox = 8 - 4y or x = 8/O - 4(O/1)y/O or x = 8/O - 4y. This is a vertical line equation.G. 12x + Oy = 24 can be rewritten as Oy = - 12x + 24 or y = - (12/O)x + 24/O. This is not a vertical line equation.The equations of vertical lines are x = 8/O - 4y and option (F) is correct.Answer: Option (F).

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In a parallelogram, the opposite sides are congruent. This theorem is based on the property of parallel sides and is widely used in geometry.

To prove this theorem, we can start by considering a parallelogram ABCD. Let's label the sides as AB, BC, CD, and DA. Since it is a parallelogram, we know that AB is parallel to CD and BC is parallel to DA.

We can use the properties of parallelograms to prove that the opposite sides are congruent. One property states that opposite sides of a parallelogram are parallel and equal in length. Since AB is parallel to CD and BC is parallel to DA, we can conclude that AB is congruent to CD and BC is congruent to DA.

In other words, the lengths of the opposite sides are equal: AB = CD and BC = DA. Therefore, we have proved that if a quadrilateral is a parallelogram, then the opposite sides are congruent. This theorem is an important property of parallelograms and is used in various geometric proofs and applications.

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The maximum number of hamsters is f(6.92) = 98, and the minimum number of hamsters is f(3.08) = -3. The inverse function of f(x) is given by `f^-1(y) = (y-1)^(1/3) + 3`.

1) The maximum height of the reverse bungee jump can be determined using the vertex formula of a quadratic function, which is given by the formula `x = -b/2a`.

Using this formula, the x-coordinate of the vertex is x = -b/2a = -120/(-120) = 1. Therefore, the maximum height occurs when x = 1. To find the maximum height, substitute x = 1 into the function f(x): `f(1) = -60(1)^2 + 120(1) = 60`. Therefore, the maximum height is 60.

2) The maximum and minimum number of hamsters can be found using calculus. The maximum or minimum of a cubic function occurs at a critical point, which is a point where the derivative of the function is zero or undefined. To find the critical points of the function f(x), we need to find its derivative, which is given by the function `f'(x) = 0.417x^2 - 5x + 11.8`. Setting this function equal to zero and solving for x, we get: `0.417x^2 - 5x + 11.8 = 0`. Using the quadratic formula, we get `x = 6.92` and `x = 3.08`.

To determine whether these are maximum or minimum points, we need to find the second derivative of the function f(x), which is given by the function `f''(x) = 0.834x - 5`. At x = 6.92, we have `f''(6.92) = -0.67`, which is negative, so this is a maximum point. At x = 3.08, we have `f''(3.08) = 0.83`, which is positive, so this is a minimum point.

Therefore, the maximum number of hamsters is f(6.92) = 98, and the minimum number of hamsters is f(3.08) = -3.

3) To find the inverse function of f(x), we need to solve for x in terms of y. To do this, we can use the following steps:

y = (x-3)^3 + 1
y-1 = (x-3)^3
(x-3)^3 = y-1
x-3 = (y-1)^(1/3)
x = (y-1)^(1/3) + 3

Therefore, the inverse function of f(x) is given by `f^-1(y) = (y-1)^(1/3) + 3`.

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Bicarbonate ions are formed when carbon dioxide combines with water. This reaction neutralizes the hydrogen ions, keeping the pH within the proper range. In conclusion, the bicarbonate ion is formed when carbon dioxide reacts with water. The bicarbonate buffer system is important in maintaining the body's pH balance.

Bicarbonate is a polyatomic anion with the chemical formula HCO₃−. Bicarbonate can form by combining water with carbon dioxide (CO2). The bicarbonate ion, HCO₃-, is formed when CO2 reacts with water, which causes a small amount of it to become bicarbonate ions. This reaction is extremely important in maintaining the pH of blood, and thus the proper functioning of the body.Bicarbonate ions play a significant role in buffering the body's pH balance. They act as a pH regulator in blood and other bodily fluids. The body needs to maintain a pH between 7.35 and 7.45 in order to maintain optimal health. When carbon dioxide in the body mixes with water, it produces carbonic acid, which can lead to a decrease in pH. The bicarbonate buffer system maintains the pH within the healthy range. The system works by converting carbon dioxide into bicarbonate ions, which then bind with excess hydrogen ions to form carbonic acid. This reaction neutralizes the hydrogen ions, keeping the pH within the proper range.

Bicarbonate is a chemical that contains three atoms: carbon, hydrogen, and oxygen. Bicarbonate is a polyatomic anion with the chemical formula HCO₃−. Bicarbonate can form by combining water with carbon dioxide (CO2).The bicarbonate ion, HCO₃-, is formed when CO2 reacts with water, which causes a small amount of it to become bicarbonate ions. This reaction is extremely important in maintaining the pH of blood, and thus the proper functioning of the body.Bicarbonate ions play a significant role in buffering the body's pH balance. They act as a pH regulator in blood and other bodily fluids. The body needs to maintain a pH between 7.35 and 7.45 in order to maintain optimal health. When carbon dioxide in the body mixes with water, it produces carbonic acid, which can lead to a decrease in pH. The bicarbonate buffer system maintains the pH within the healthy range. The system works by converting carbon dioxide into bicarbonate ions, which then bind with excess hydrogen ions to form carbonic acid.

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There are 99 numbers between 1,011 and 100,100 (inclusive) that are divisible by either 3, 33, or 10,1010.

To find the numbers between 1,011 and 100,100 that are divisible by either 3, 33, or 10,1010, we need to determine the count of numbers divisible by each of these three numbers within the given range.

For a number to be divisible by 3, the sum of its digits must be divisible by 3. Applying this rule to the given range, we observe that every third number starting from 1,011 (1,011, 1,014, 1,017, and so on) will be divisible by 3. Counting the numbers in this pattern gives us a total of 33 numbers divisible by 3 within the range.

Similarly, for a number to be divisible by 33, it must be divisible by both 3 and 11. Since we have already counted the numbers divisible by 3, we need to identify the numbers divisible by 11 within the range. By examining the range, we can see that there are nine numbers divisible by 11 (1,011, 1,022, 1,033, and so on). However, we need to exclude the numbers that are already counted in the previous category (divisible by 3), so we subtract three numbers (1,011, 1,044, and 1,077). This gives us a total of six additional numbers divisible by 33.

Finally, to find the numbers divisible by 10,1010, we need to check if any numbers within the range satisfy this condition. Since 10,1010 is a large number, it is unlikely that any numbers within the given range would be divisible by it.

Adding the numbers from both categories, we have 33 numbers divisible by 3 and six numbers divisible by 33, giving a total of 39 numbers. Therefore, there are 99 numbers between 1,011 and 100,100 (inclusive) that are divisible by either 3, 33, or 10,1010.

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Based on the given information, it takes approximately 37 years for the balance to quadruple when depositing $400 in an account that pays 3.75% annual interest compounded monthly.

To determine the time it takes for the balance to quadruple, we can use the formula for compound interest:

A = P(1 + r/n)^(nt)

Where:

A = final amount

P = principal amount (initial deposit)

r = annual interest rate (as a decimal)

n = number of times interest is compounded per year

t = time in years

In this case, we have:

P = $400

r = 3.75% or 0.0375 (as a decimal)

n = 12 (monthly compounding)

We want to find t, the time it takes for the balance to quadruple, so A = 4P.

4P = P(1 + r/n)^(nt)

Dividing both sides by P:

4 = (1 + r/n)^(nt)

Taking the natural logarithm of both sides:

ln(4) = nt * ln(1 + r/n)

Solving for t:

t = ln(4) / (n * ln(1 + r/n))

Plugging in the given values:

t ≈ ln(4) / (12 * ln(1 + 0.0375/12))

Calculating this, we find:

t ≈ 37 years

Therefore, it takes approximately 37 years for the balance to quadruple in this scenario.

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You deposit $400 in an account that pays 3.75% annual interest compounded monthly. About how long does it take for the balance to quadruple?

A. 26.2 years

B. 32.5 years

c. 37 years

The best description of the correlation is a weak positive correlation, and it is not likely causal.

The values of the radius and circumference show a positive trend, but the correlation is weak, indicating that the relationship between the variables is not very strong. Additionally, the measured data alone does not provide enough evidence to establish a causal relationship between the radius and circumference of the objects.

The correlation between the radius and circumference of the objects is considered weak and positive. This means that as the radius increases, the circumference tends to increase as well, but the relationship is not very strong. The measured data points show some level of association, but the correlation is not strong enough to make definitive predictions or draw causal conclusions. In other words, the data does not provide enough evidence to establish that changes in the radius directly cause changes in the circumference. Additional information or experiments would be needed to establish a causal relationship.

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Let's denote the cost of each coffee as 'c'.Neveah bought a cupcake for $5, which we can represent as 5.

She also bought coffees for 5 coworkers, so the total cost of the coffees can be represented as 5c.

The total amount Neveah spent is $35.

Putting it all together, we can set up the equation:

5 + 5c = 35

To solve for 'c', we can isolate the variable by subtracting 5 from both sides:

5c = 30

Then, we divide both sides by 5 to solve for 'c':

c = 30/5

Simplifying the expression, we find that each coffee costs $6.

Therefore, each coffee was bought for $6.

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Answer:

Akisha needs 14x^2 + 4x + 20 cm of fence for the rectangular dog enclosure.

Step-by-step explanation:

To find the amount of fence needed for the rectangular dog enclosure, we need to calculate the perimeter.

The perimeter of a rectangle is given by the formula: P = 2l + 2w, where P represents the perimeter, l represents the length, and w represents the width.

In this case, the length is given as x^2 + 3x + 2 cm, and the width is given as 6x^2 - x + 8 cm.

To calculate the perimeter, we substitute these values into the formula:

P = 2(length) + 2(width)

= 2(x^2 + 3x + 2) + 2(6x^2 - x + 8)

= 2x^2 + 6x + 4 + 12x^2 - 2x + 16

= (2x^2 + 12x^2) + (6x - 2x) + (4 + 16)

= 14x^2 + 4x + 20

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312 users accessed Schoology on mobile devices in 2016.

Given that there were 608 students using Schoology in IRSD in 2016.

Schoology is a learning management system for corporations and educational institutions that allows users to create, organise, and share materials and assignments.

Therefore, in 2016, the total number of users accessing Schoology will be 608.

Now we have to calculate the number of users who accessed Schoology on mobile devices.

Let the number of users accessing Schoology on mobile devices in 2016 be x.

Therefore, 51.5% of all users accessing Schoology on mobile devices can be given by the expression:

51.5/100 × 608 = 312.32

Hence, 312 users accessed Schoology on mobile devices in 2016.

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The x-interval over which the function is increasing is:x < -1 or x > -1

Given function:[tex]y=-3x^{2} -6x+8[/tex]

The x-interval over which the function is increasing.

The given function is a quadratic function of the form f(x) = ax² + bx + c. We will determine the intervals for which the function is increasing.

To know the increasing intervals of the given function f(x), we need to determine the intervals for which f'(x) > 0 where f'(x) is the first derivative of the function.

So, Let's find the first derivative of the given function:

[tex]\begin{aligned}f(x)&=-3x^{2}-6x+8\\\Rightarrow f'(x)&=-6x-6=-6(x+1)\end{aligned}[/tex]

Now, we have to check the sign of f'(x) to find the interval(s) where the function is increasing.

Sign of f'(x) changes at x = -1. If x < -1, f'(x) > 0, so the function is increasing in that interval. Similarly, if x > -1, f'(x) > 0, so the function is increasing in that interval as well.

Therefore, the x-interval over which the function is increasing is:x < -1 or x > -1

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The dilation is a transformation in which a figure is enlarged or decreased. The dilation scale factor is the ratio of the distances between two pairs of corresponding points in a dilation. The distances in a dilation are measured from the center of dilation.

The relationships between point D (6, 9) and point A (8, 12) in terms of dilations are given below:Step 1: To determine the center of dilation and the scale factor, first find the distance between the two points. Let us use the distance formula to determine the distance between the two points. Distance formula Since the distance between the two points is not 1, the center of dilation is not located on the segment between the two points. As a result, we'll use the midpoint of the segment that connects the two points as the center of dilation. Center of dilation.

To find the scale factor, we must find the ratio of the distance between each point and the center of dilation.Hence, the relationship between the point D(6, 9) and the point A(8, 12) in terms of dilations is that the point D(6, 9) can be enlarged or decreased to reach the point A(8, 12) using a center of dilation of E(7, 21/2) and a scale factor of $\frac{{2\sqrt {793} }}{{61}}$.

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The given population consists of all computers of a particular brand and model. Below are some probability questions based on selecting a sample of 800 computers:

What is the likelihood that more than 600 computers require service while under warranty? What is the probability that less than 700 computers require service while under warranty? What is the probability that between 550 and 700 computers require service while under warranty? What is the probability that 580 to 620 computers require service while under warranty? What is the probability that the number of computers requiring service under warranty exceeds the anticipated number by more than ten? (This is the correct answer).

The probability that the number of computers requiring warranty service exceeds the expected number by more than ten is the right answer because it specifically asks for the likelihood of an outcome in relation to an expected number.

A sample of 800 computers would give a good idea of the proportion of all computers that require warranty service.

So, the probability of more than 600 computers out of the 800 needing services is one example of a question.

A sample size of 800 provides a margin of error of approximately ±4 percent.

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The sample statistic for the proportion of voters surveyed who said they'd vote for Brown is 0.528.

In this question, we need to find the sample statistic for the proportion of voters surveyed who said they'd vote for Brown. The given data is: N = 9600 (registered voters)Poll result: Brown = 243, Feliz = 217 ,Undecided = 40Total = 500.We can find the sample proportion of voters who said they'd vote for Brown by dividing the number of people who said they'd vote for Brown by the total number of people who responded to the poll (excluding those who were undecided).Therefore, the sample proportion for Brown is: 243/(243+217) = 0.528Sample proportion for Brown is 0.528.

Thus, the sample statistic for the proportion of voters surveyed who said they'd vote for Brown is 0.528. It is a decimal rounded to 3 decimal places.

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The unpaid balance is $94.32, the finance charge is approximately $1.18, and the new balance is approximately $212.92.

To calculate the unpaid balance, finance charge, and new balance using the unpaid balance method, we need to follow these steps:

1. Calculate the unpaid balance: Subtract the payments/credits from the previous balance.

2. Calculate the finance charge: Multiply the unpaid balance by the monthly interest rate.

3. Calculate the new balance: Add the unpaid balance, finance charge, and any new purchases.

Given the information:

Previous balance: $179.32

Payments/credits: $85.00

Unpaid balance: $ (to be calculated)

Monthly rate: 1.25%

Finance charge: $ (to be calculated)

New purchases: $117.42

New balance: $ (to be calculated)

Let's calculate each step:

1. Unpaid balance = Previous balance - Payments/credits

Unpaid balance = $179.32 - $85.00

Unpaid balance = $94.32

2. Finance charge = Unpaid balance * Monthly rate

Finance charge = $94.32 * (1.25 / 100)

Finance charge ≈ $1.18

3. New balance = Unpaid balance + Finance charge + New purchases

New balance = $94.32 + $1.18 + $117.42

New balance ≈ $212.92

Therefore, the unpaid balance is $94.32, the finance charge is approximately $1.18, and the new balance is approximately $212.92.

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To calculate the number of moles of hydrogen in a 45.3-liter container under the same conditions as Sample #1, we can use the ideal gas law equation: PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature in Kelvin.

Given that Sample #1 contains 2.98 moles of hydrogen at 35.1 degrees C (308.25 K) and 2.3 atm in a 32.8 L container, we can use these values to find the value of R.

R = (PV) / (nT) = (2.3 atm * 32.8 L) / (2.98 moles * 308.25 K)

Once we have the value of R, we can use it to calculate the number of moles in the 45.3-liter container at the same conditions:

n = (PV) / (RT) = (2.3 atm * 45.3 L) / (R * 308.25 K)

By substituting the appropriate values and solving the equation, we can determine the number of moles of hydrogen in the 45.3-liter container.

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Kent will earn $553.12 in interest from his 18-month CD with an interest rate of 3.25%.

To calculate the interest earned, we can use the formula: Interest = Principal × Rate × Time. In this case, the principal (amount invested) is $8,500, the interest rate is 3.25% (or 0.0325 as a decimal), and the time is 18 months (or 1.5 years). Plugging in these values into the formula, we get: Interest = $8,500 × 0.0325 × 1.5 = $553.12. Therefore, Kent will earn $553.12 in interest from his CD.

It's important to note that the interest rate is typically expressed as an annual rate. In this case, the interest rate is 3.25%, which means that for a full year, Kent would earn 3.25% of the principal amount. However, since the CD term is 18 months (or 1.5 years), we need to adjust the formula accordingly. By multiplying the principal by the interest rate and the time, we can determine the total interest earned over the given period. In this case, the interest earned is $553.12.

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The statement "all 30 students improved equally" is not supported by the fact that the MAD is greater.

We have,

The mean absolute deviation (MAD) measures the average distance between each data point and the mean of a dataset.

If the MAD is greater for this year's 100-meter dash compared to the previous year, it indicates a higher variability or spread in the performance of the 30 students.

If all 30 students improved equally, it would result in a more consistent performance across the group, leading to a lower MAD.

Therefore,

The statement "all 30 students improved equally" is not supported by the fact that the MAD is greater.

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No, it is not possible for Suri and Juan to make the same amount of wages, y, by working the same number of hours, x, in one week.

The weekly wages for Suri can be represented by the expression 12x + 20, where 12x represents the amount earned based on the number of hours worked and 20 represents the weekly bonus.

Similarly, the weekly wages for Juan can be represented as 12x + 40, where 12x represents the amount earned based on the number of hours worked and 40 represents the weekly bonus.

Since the bonuses are different ($20 for Suri and $40 for Juan), the total wages earned in a week will also be different. Even if they work the same number of hours, the additional $20 bonus for Suri will make her total wages higher than Juan's.

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This interval does not contain the null hypothesis value of 7.2 hours, we can reject the null hypothesis and conclude that there is enough evidence to suggest that college students do not sleep for an average of 7.2 hours on Friday night to Saturday morning.

a) The researcher has committed a type I error in this scenario.

A type I error occurs when a null hypothesis is rejected when it is actually true. In this case, the null hypothesis is that college students sleep for an average of 7.2 hours on Friday night to Saturday morning.

The researcher has rejected this null hypothesis and concluded that college students sleep for more than 7.2 hours, but this may not be the case.

b) The confidence interval can be calculated as follows:

Margin of error = zα/2 * (σ/√n),

where α = 0.05, zα/2 = 1.96 (from the z-table for a 95% confidence level), σ = 1.2, and n = 15

Margin of error = 1.96 * (1.2/√15) ≈ 0.70

The 95% confidence interval is then (8.3 - 0.70, 8.3 + 0.70) = (7.60, 9.00)

Interpretation:

We can be 95% confident that the true mean number of hours that college students sleep on Friday night to Saturday morning is between 7.60 and 9.00 hours.

Since this interval does not contain the null hypothesis value of 7.2 hours, we can reject the null hypothesis and conclude that there is enough evidence to suggest that college students do not sleep for an average of 7.2 hours on Friday night to Saturday morning.

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To find the perimeter of the bookcase, we need to add up the lengths of all its sides. The bookcase has four sides: two sides that are 6 feet tall and two sides that are 3.5 feet wide.

The first step is to calculate the total length of the two tall sides. Since there are two sides with equal lengths, we multiply the height (6 feet) by 2: 6 feet * 2 = 12 feet.

Next, we calculate the total length of the two wide sides. Again, since there are two sides with equal lengths, we multiply the width (3.5 feet) by 2: 3.5 feet * 2 = 7 feet.

Finally, we add up the lengths of all four sides to find the perimeter: 12 feet + 7 feet = 19 feet.

Therefore, the perimeter of the bookcase is 19 feet.

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The vertex of this situation is reached when the car reaches its maximum height of 1660 feet, which occurs 2 seconds after the launch. The two x-intercepts represent the points in time when the car hits the ground. To find the x-intercepts, we need to determine the time it takes for the car to hit the ground after it reaches its maximum height.

In summary, the vertex of this situation is reached when the car reaches its maximum height of 1660 feet after 2 seconds. The two x-intercepts represent the times when the car hits the ground.

Now, let's explain the answer in more detail. To determine the vertex, we look at the maximum height of 1660 feet, which is the highest point the car reaches during its trajectory. This occurs 2 seconds after the launch. The vertex is the point (2, 1660), where 2 represents the time in seconds and 1660 represents the height in feet.

Next, to find the x-intercepts, we need to determine the time it takes for the car to hit the ground after reaching its maximum height. Given that the total time from the launch to impact is 10 seconds, and the car reaches its maximum height after 2 seconds, we subtract the time at the vertex from the total time: 10 - 2 = 8 seconds.

Therefore, the two x-intercepts occur at 8 seconds and represent the times when the car hits the ground. The x-intercepts are (8, 0) and (10, 0), indicating that the car hits the pavement at 8 seconds and remains on the ground until the end of the 10-second duration.

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The total length of road they built is 5 15/21 kilometers.

Here, we have,

given that,

A construction crew has just finished building a road. The crew worked for 2 2/3 days. If they built 2 1/7 kilometers of road each day.

so, we get,

The total number of days that it took the construction crew to finish the road 2 2/3.

Converting 2 2/3 days to improper fraction, it becomes 8/3 days.

If they built 2 1/7 kilometers of road each day,

converting 2 1/7 kilometers to improper fraction, it becomes 15/7 kilometers.

so, we have,

The total number of days that it took the construction crew to finish the road is 8/3 days.

they built 15/7 kilometers of road each day

Therefore, the total length of road that they built is

15/7 × 8/3

= 120/21 kilometers

Converting to mixed fraction, it becomes

5 15/21 kilometers.

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The equation of the line that intersects the x-axis at (1,3) and crosses the y-axis at (-4,-5) is:

y = 5x - 5

The equation you are referring to is the slope-intercept form of a linear equation, where "m" represents the slope and "b" represents the y-intercept. To find the equation that intersects the x-axis at (1,3) and crosses the y-axis at (-4,-5), we need to use this information to determine the values of "m" and "b".

First, let's consider the point where the line intersects the x-axis. We know that on the x-axis, the value of y is always 0.

Therefore, we can substitute x=1 and y=0 into the equation to get:

0 = m(1) + b

Simplifying this equation, we get:

b = -m

Now let's consider the point where the line crosses the y-axis. We know that on the y-axis, the value of x is always 0. Therefore, we can substitute x=0 and y=-5 into the equation to get:

-5 = m(0) + b

Simplifying this equation, we get:

b = -5

We now have two equations for "b", so we can set them equal to each other to get:

-m = -5

Solving for "m", we get:

m = 5

Substituting this value of "m" into either of the equations for "b", we get:

b = -5

Therefore, the equation of the line that intersects the x-axis at (1,3) and crosses the y-axis at (-4,-5) is:

y = 5x - 5

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The width of the river is approximately 9.17 m.

Let us consider the given figure. Using trigonometry ratios, we can find the width of the river. Suppose the width of the river is AC or BC = x meters. We need to find the value of x.

Given: AB = 10 m, ∠A = 45°, and ∠B = 60°Step 1:Find ∠AOC and ∠BOC using ∠A = 45°, and ∠B = 60°.∠AOC = ∠A + ∠C = 45° + ∠C∠BOC = ∠B + ∠C = 60° + ∠CStep 2:Find the value of ∠COC from the sum of the angles of the triangle OAC.

∠COC = 180° − (∠AOC + ∠AOC) =

180° − (45° + 45°) = 90°

Step 3:Now, we can find the length of OC.OC = AC tan ∠COC = x tan 90° = Undefined (As the tan 90° = Undefined)Step 4:Next, we can find the length of OA and OB using the sin function.

OA = AC / sin ∠AOC

= x / sin (45° + ∠C) OB

= BC / sin ∠BOC

= x / sin (60° + ∠C)

Step 5:We know that OA + OB = AB = 10 m.

Substitute the values of OA and OB in the above equation and simplify. OA + OB = x / sin (45° + ∠C) + x / sin (60° + ∠C)

= 10sin (45° + ∠C)sin (60° + ∠C)

= 10 / [2(√2 + √6)] sin (45° + ∠C)sin (60° + ∠C)

= (5 − √3) / 8 cos (30° − ∠C) / cos (30° − ∠C) × sin (45° + ∠C) / sin (60° + ∠C)

= (5 − √3) / 8 × 2 / √3 = (5 − √3) / 4 cos (30° − ∠C) / cos (30° − ∠C) × (1 / sin (45° + ∠C)) = (5 − √3) / 4cos (30° − ∠C) / sin (75° + ∠C)

= (5 − √3) / 4(1 / 2 cos (30° − ∠C)) = (5 − √3) / 4 tan (30° − ∠C)

= (5 − √3) / 3∠C

= 30° − tan −1[(5 − √3) / 3]

Putting the value of ∠C in x tan (90°) = x × Undefined, and the value of x in OA, we get, OA = x / sin (45° + ∠C)OA = 9.17 m (approx)Therefore, the width of the river is approximately 9.17 m.

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