A measure is given as 2.0 km correct to


the nearest 500 m. What is the upper


bound?

Answers

Answer 1

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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Related Questions

A water pump can pump 13.2 gallons of water in a pool every minute how much water will be remove in 15 minutes

Answers

In 15 minutes, a water pump capable of pumping 13.2 gallons of water per minute will remove a total of 198 gallons of water from the pool.

If a water pump can pump 13.2 gallons of water in a pool every minute, we can calculate the amount of water it will remove in 15 minutes by multiplying the pumping rate by the duration. Therefore, 13.2 gallons/minute x 15 minutes = 198 gallons. During the 15-minute period, the water pump will continue to operate at a constant rate, removing water from the pool. Each minute, 13.2 gallons of water will be pumped out. When we multiply this rate by the duration of 15 minutes, we find that a total of 198 gallons of water will be removed from the pool. It's important to note that this calculation assumes a constant pumping rate without any interruptions or changes in efficiency.

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A real estate agent earns a 6% commission for the sale of a home. A home sold for $350,000. What was the commission earned by the agent?.

Answers

answer : 21,000

explanation: see attached picture

if the division expression is 7 divided into 3 what is the unit form

Answers

The division expression is 7 divided into 3 which can be represented in unit form as follows; 7 ÷ 3 = 2 R1, this means that 7 divided by 3 equals 2, with a remainder of 1.

The remainder is the value left after an integer has been divided by a divisor, such as the number left over after a long division of 7 ÷ 3. Therefore, the value of circle plus circle is given by the formula: $$\text{Circle plus Circle} = πr_1^2 + πr_2^2$$ where r1 and r2 are the radii of the two circles respectively. If the values of the radii are provided, then we can substitute them in the above formula to find the value of circle plus circle.

The area of a circle is given by the formula A = πr² where A is the area of the circle and r is the radius. Therefore, the formula for the value of circle plus circle is given by Circle plus Circle = πr1² + πr2² where r1 and r2 are the radii of the two circles respectively. As we already know that a circle is a geometric figure having no end. It has many properties. One of its properties is that its area can be measured. When we talk about the area of a circle, we are referring to the region enclosed by it. The area of a circle is given by the formula: A = πr², where A is the area of the circle and r is its radius. The symbol π represents the constant pi, which is approximately equal to 3.14. Therefore, the area of a circle is proportional to the square of its radius. If we have two circles with radii r1 and r2, then the area of the first circle is given by A1 = πr1², and the area of the second circle is given by A2 = πr2².

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The line of best fit can be represented by the equation y=−6x+97, where x represents the number of absences and y represents the final grade.

Answers

The line of best fit is a straight line that best fits the scattered data points on a scatterplot. It is represented by the equation y = mx + b, where m is the slope of the line and b is the y-intercept.

In this particular case, the equation of the line of best fit is y = -6x + 97, where x represents the number of absences and y represents the final grade.

This means that for every additional absence a student has, their final grade is expected to decrease by 6 points. The y-intercept of 97 means that if a student had zero absences, their predicted final grade would be 97.

It is important to note that the line of best fit is a prediction, and not a definitive statement about the relationship between the variables. While it can provide some insight into the relationship between the number of absences and final grade, there may be other factors that are not taken into account by the model.

Additionally, the equation of the line of best fit is only valid within the range of the data used to create the model. Extrapolating beyond this range may not produce accurate predictions.

Overall, the line of best fit is a useful tool for analyzing relationships between variables, but it should be used with caution and in conjunction with other analyses to get a complete understanding of the relationship between variables.

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Select all the expressions that represent a 20% discount off the price of an item that originally costs d dollars

Answers

The expressions that represent a 20% discount off the price of an item that originally costs d dollars are A. 0.8d and C. d-0.2d.

How to find the expressions ?

A 20% discount off the original price means that the discounted price is equal to 80% (100% - 20%) of the original price. Therefore, we can calculate the discounted price by multiplying the original price (d) by 0.8 (representing 80%).

Expression A (0.8d) represents the discounted price as 80% of the original price (d), so it is correct. Expression C, d-0.2d" represents a 20% discount off the price of an item that originally costs d dollars.

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Full question is:

Select all the expressions below which represent a 20% discount off the price of an item that originally costs d dollars.

A. 0.8d

B. d-0.2

C. d-0.2d

D. 1-0.2d​​

Write the following ratios in their lowest terms: Mixing pink paint uses 3 litres of white paint and 1 litre of red. What is the ratio of white to red?

Answers

The simplified ratio is: 3 : 1. This means that for every 3 liters of white paint, 1 liter of red paint is used in the mixture.

To find the ratio of white paint to red paint, we need to compare the amounts of white paint and red paint used. The given information states that mixing pink paint requires 3 liters of white paint and 1 liter of red paint.

The ratio of white paint to red paint can be expressed as:

White : Red

To simplify this ratio to its lowest terms, we need to find the greatest common divisor (GCD) of the two numbers (3 and 1) and divide both numbers by it.

The GCD of 3 and 1 is 1, as there are no common factors other than 1. Therefore, we divide both numbers by 1:

3 ÷ 1 = 3

1 ÷ 1 = 1

The ratio 3 : 1 represents the proportional relationship between white paint and red paint in terms of liters. It indicates that for every 3 liters of white paint, only 1 liter of red paint is needed to achieve the desired mixture.

This ratio is already in its simplest form since the GCD of 3 and 1 is 1, and there are no further common factors to divide both numbers by.

In conclusion, the ratio of white paint to red paint in the mixture is 3 : 1.

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The price of everything in the store is reduced by 1/4 each hour until closing time. Liz wants to purchase a shirt that was originally marked at 24$. You can use a function to describe the shirts price x hours after the sale starts.

Answers

To describe the price of the shirt x hours after the sale starts, we can use the following function:

P(x) = 24 * (3/4)^x

In this function, P(x) represents the price of the shirt x hours after the sale starts.

Here's how the function works:
- The original price of the shirt is $24.
- Each hour, the price decreases by 1/4 (or 25%) of its current value.
- So, after the first hour, the price will be 24 * (3/4) = $18.
- After the second hour, the price will be 18 * (3/4) = $13.50.
- This process continues for each subsequent hour.

Using the function P(x) = 24 * (3/4)^x, you can substitute any value of x (representing the number of hours since the sale started) to find the corresponding price of the shirt at that time.

Let ​​ f(x)=−32x and ​ g(x)=(12)x−1. Graph the functions on the same coordinate plane. What are the solutions to the equation f(x)=g(x) ? Enter your answers in the boxes. X = or x =.

Answers

The solutions to the equation f(x) = g(x) are x = 1/65. Hence, this is our final answer.

We have the following functions to graph:f(x)=−32x and ​g(x)=(12)x−1.Similarly, to graph the above functions we would require a table of values. For this we set x = −2, −1, 0, 1, 2 and solve for f(x) and g(x):x -2 -1 0 1 2f(x) 192 96 0 −32 −64g(x) 0.25 0.5 1 2 4Once we get the table of values, we can then graph the functions on the same coordinate plane.

We have the graph as below:Graph of f(x) = −32x and g(x) = (1/2)x−1Now to get the solutions to the equation f(x) = g(x), we equate the two expressions:−32x = (1/2)x−1Multiplying both sides by 2, we get:-64x = x - 1Collecting like terms, we get:-65x = -1Dividing both sides by -65, we get:x = 1/65

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An engineer is designing a storage compartment in an aircraft. The compartment's volume is 72 cubic meters. The width is 2 meters longer than the length. The height is 1 meter less than the length. Find the dimensions of the compartment.

Answers

An engineer is designing a storage compartment in an aircraft. The compartment's volume is 72 cubic meters. The width is 2 meters longer than the length. The height is 1 meter less than the length. the dimensions of the compartment are 4m × 6m × 3m.

Find the dimensions of the compartment. Solution:The volume of a rectangular prism is given by;[tex]`V= l × w × h`[/tex] Given that the compartment's volume is 72 cubic meters, let's substitute[tex]`V = 72`[/tex]

cubic meters;[tex]`l × w × h = 72`[/tex]

We also know that;[tex]w = l + 2h = l - 1[/tex]

Substituting w and h in terms of l, we get;[tex]`l(l+2)(l-1) = 72`[/tex]Expanding,

we get;[tex]`l(l²-1) + 2(l²-1) = 72`[/tex]

Simplifying, we get;[tex]`l³ + l² - 2l - 74 = 0`[/tex]

We will use trial and error method to find one of the roots,`l= 4`.

By substitution, we get;[tex]w = 4 + 2 = 6m h = 4 - 1 = 3m[/tex]

Thus, the compartment dimensions are 4m × 6m × 3m. The width is 6 meters, the length is 4 meters, and the height is 3 meters.

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the table shows the cost, y of buying boxes, x, of cookies write an equation that models this situation

Answers

y = 5x

This equation implies that each box of cookies costs $5.

To write an equation that models the relationship between the cost, y, of buying boxes of cookies, x, we need the values from the table. Since you haven't provided the specific values in the table, I'll give you an example equation based on a general scenario.

Let's assume that the cost of buying boxes of cookies follows a linear relationship with the number of boxes purchased. In this case, the equation can be written in the form:

y = mx + b

Where:

y represents the cost of buying boxes of cookies.

x represents the number of boxes purchased.

m represents the slope of the line, which indicates the rate of change in the cost per box.

b represents the y-intercept, which is the initial cost when no boxes are purchased.

You would need to substitute the actual values from your table into this equation to create a specific model for your situation. For instance, if the table shows the following data:

Boxes (x) Cost (y)

1            5

2            10

3            15

4            20

We can use these values to find the slope (m) and y-intercept (b) using linear regression techniques. Then, the equation that models this situation would be:

y = 5x

This equation implies that each box of cookies costs $5.

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Un arquitecto diseña el arco principal de la nave de una iglesia en forma de una semicircunferencia (180°), con un radio de 2.5m ¿Qué longitud debe tener ese arco a construir?

Answers

Based on the above, the length of the arch should be approximately 7.85 meters.

What is the arch?

To know the length of the arch, one need to calculate the circumference of the semicircle.

The circumference of a full circle is: C = 2πr

Note that the semicircle is (180°), so one need to divide the circumference by 2 to get the length of the arch:

Length of the arch = C/2 = (2πr)/2 = πr

Given the radius (r) of 2.5m, one need to substitute the value into the formula:

Length of the arch = π × 2.5

= 3.14 × 2.5

=7.85 meters

Therefore, the architect should build the arch with a length of about 7.85 meters.

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See text below

An architect designs the main arch of the nave of a church in the shape of a semicircle (180°), with a radius of 2.5m. How long should that arch be built?

Last night there were 100 people the attended the school play. There was a combination of adults and children that attended the event. Each child ticket cost $5 and each adult ticket cost $8. There was a total of $626 collected at the door. Write and solve a system of equations to find out how many children and how many adults attended the event

Answers

To find out how many children and how many adults attended the event, we can set up a system of equations based on the given information.

Let's use the variables c and a to represent the number of children and adults, respectively. The total number of people who attended the event is 100, and the total amount collected at the door is $626. Each child ticket costs $5, and each adult ticket costs $8. By setting up and solving a system of equations, we can determine the values of c and a.

Let c represent the number of children and a represent the number of adults who attended the event. We can set up the following system of equations based on the given information:

Equation 1: c + a = 100 (total number of people who attended the event)

Equation 2: 5c + 8a = 626 (total amount collected at the door)

We can solve this system of equations using various methods such as substitution, elimination, or matrix methods. Here, we'll solve it using the substitution method.

From Equation 1, we have c = 100 - a. Substitute this value into Equation 2:

5(100 - a) + 8a = 626

500 - 5a + 8a = 626

3a = 126

a = 42

Substitute the value of a into Equation 1:

c + 42 = 100

c = 58

Therefore, 58 children and 42 adults attended the event.

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The box­and­whisker plots below represent the scores for pre­ and post­written tests for applicants obtaining their driver’s licenses. A passing score is 70%. Which of the following is best supported by the information in the graphs? A. Exactly 25% more applicants passed the post­test than the pre­test. B. Exactly 50% more applicants scored below the passing score on the pre­test than on the post­test. C. Of all the applicants that passed the pre­test, only 25% scored higher than a 90. D. Of all the applicants that passed the post­test, only 50% scored between a 70 and an 80.

Answers

C. Of all the applicants that passed the pre-test, only 25% scored higher than a 90.

Write a rule relating to the minutes, x, to the number of pages, y. Then find the number of pages when the minutes equal 72.

Answers

The number of pages read in 72 minutes is 144 pages.

When given a table of values, the relationship between the values ​​is often expressed as a rule or an equation. A formula that links the number of pages in a book to the number of minutes it takes to read it is often used in book reviews or book reports.  

Rule relating to the minutes, x, to the number of pages, y

Let us assume that reading x minutes corresponds to y pages. In other words, we want to identify an equation or formula that links the two variables.

The number of pages read in one minute is calculated by dividing the total number of pages by the total time it takes to read them.

y / x = k, where k is the constant of variation, or the number of pages that can be read in one minute. If the number of pages is directly proportional to the number of minutes, then the k value remains constant.

If we solve for y, we get the following:

y = kx

When the minutes equal 72, we will find the number of pages.

We know that k is a constant, so we may use any of the given (x, y) pairs.

The given minute value is x, and we want to find the corresponding page value, y.

Let us assume that 120 pages can be read in 60 minutes.

We may solve for k using this information:120 / 60 = k2 = k

Now that we know k, we may use the equation to determine the number of pages that can be read in 72 minutes:

y = kx

y = 2 * 72y = 144

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Nadia has £5 to buy pencils and rulers. She says,

"I will buy 15 pencils. Then I will buy as many rulers as possible

With my change I will buy more pencils. "

How many pencils and how many rulers does she buy?

Answers

Nadia has £5 to buy pencils and rulers. She says,"I will buy 15 pencils. Then I will buy as many rulers as possible. With my change, I will buy more pencils.

"Let the price of each pencil be p and the price of each ruler be r. Presenting the above scenario into the equation,15p + (x × r) = 5Here, x is the number of rulers to be bought. To minimize the number of pencils Nadia will buy with the change, we have to calculate the maximum number of rulers she can buy with the given £5.Let's assume Nadia buys a maximum of y rulers with all of her money, thus the number of pencils she will be left to buy will be,15p + (y × r) ≤ 5Therefore, Nadia can purchase 15 pencils and 2 rulers with £5 as shown below,15p + (2 × r) = 5Nadia can then buy more pencils with the remaining money, which is,£5 − [(15 × p) + (2 × r)] = Remaining money£5 − [(15 × 0.20) + (2 × 0.35)] = 0.40Hence, Nadia can buy 2 rulers and 15 pencils. She can buy only 2 rulers as many rulers she can buy with £5 is only 2.

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Two vertical posts stand side by side. One post is 8 feet tall and the other is


17 feet tall, if a 24 foot post is stretched between the tops of the posts,


how far apart are the posts?


22. 6


25. 3


22. 2.


26. 7


Will mark brainliest

Answers

The answer is 25. 3. Hence, option B is the correct answer.

Given that the two vertical posts stand side by side. One post is 8 feet tall and the other is 17 feet tall, and a 24-foot post is stretched between the tops of the posts, we need to find how far apart are the posts?We have to use the Pythagorean Theorem to find the distance. The theorem states that in a right-angled triangle, the square of the length of the hypotenuse is equal to the sum of the squares of the lengths of the other two sides of the triangle.The figure can be drawn as below:

Here, AB is the 24 foot post, and A and B are the tops of the shorter and the taller post, respectively.

From the figure, we can observe that:

In triangle ABC,

AB² = AC² + BC² (According to Pythagoras theorem)

AC = 8 feet

BC = 17 feet

AB = 24 feet

Substituting the values in the above formula we get,

24² = 8² + 17²

576 = 64 + 289

576 = 353 + BC²

BC² = 576 - 353

BC² = 223

BC = sqrt(223)

The distance between the two posts is the length of the line segment CD, which is BC minus the length of the line segment AD.

Therefore,

Distance between the posts = BC - AD= sqrt(223) - 24= 3.17 ft (approx)

Therefore, the answer is 25. 3. Hence, option B is the correct answer.

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step by step explanation for expressions d and e Thank you loads!!!

Answers

Answer:

Step-by-step explanation:

D)

[tex]\frac{4\sqrt{b} }{\sqrt{3}-b }[/tex]                         > in order to get rid of root on bottom like this, you

                                  need to multiply top and bottom by conjugate

                                  √3 +b

[tex]=\frac{4\sqrt{b} }{\sqrt{3}-b }\frac{\sqrt{3}+b}{\sqrt{3}+b}[/tex]              > Distribute on top and FOIL bottom

[tex]=\frac{4\sqrt{3b}+4b\sqrt{b} }{3 -b^{2} }[/tex]               >This is simplified, you cannot combine anything else

E)

[tex]\frac{3\sqrt{a^{2} } } {\sqrt{3} } / 2a^{\frac{3}{2} }[/tex]                    >√a² = a

[tex]=\frac{3a } {\sqrt{3} } / 2a^{\frac{3}{2} }[/tex]                    >Division of fraction keep change flip

[tex]=\frac{3a } {\sqrt{3} } * \frac{1}{2a^{\frac{3}{2}} }[/tex]                  >Because 2a is not in parenthesis 3/2 exp.

                                     is only for a

[tex]=\frac{3a } {\sqrt{3} } * \frac{1}{2\sqrt{a^{3} } }[/tex]              > You can make 1 set of a² so 1 comes out but 1 stays

[tex]=\frac{3a } {\sqrt{3} } * \frac{1}{2a\sqrt{a } }[/tex]              >put like items under root

[tex]=\frac{3a } {2a\sqrt{3a} }[/tex]                     >multiply top and bottom by root

[tex]=\frac{3a } {2a\sqrt{3a} }*\frac{\sqrt{3a}}{\sqrt{3a}}[/tex]             >multiply

[tex]=\frac{3a\sqrt{3a} } {2a(3a)} }[/tex]                       >3a cancels

[tex]=\frac{\sqrt{3a} } {2a} }[/tex]                           >This is simplified

Which shows one way the equation can be represented in words? z minus 6 = 1. 4 The difference of a number and z is the same as one and four-tenths. A number subtracted from one and four-tenths is equal to six. Six less than a number is the same as one and four-tenths. Six decreased by a number is equal to one and four-tenths.

Answers

The correct representation of the equation "z minus 6 = 1.4" in words is "The difference of a number and z is the same as one and four-tenths."

The equation "z minus 6 = 1.4" can be represented in words as "The difference of a number and z is the same as one and four-tenths." This representation accurately conveys the meaning of the equation.

Let's break down the equation to understand its components. "z minus 6" represents the difference between the number z and 6. The equal sign indicates that this difference is equal to "1.4", which means one and four-tenths.

Now let's analyze the answer choices:

"The difference of a number and z is the same as one and four-tenths." This choice correctly represents the equation, expressing that the difference between a number and z is equal to 1.4.

"A number subtracted from one and four-tenths is equal to six." This choice represents a different equation, where a number is subtracted from 1.4, resulting in six. It does not match the original equation.

"Six less than a number is the same as one and four-tenths." This choice represents a different equation, where six is subtracted from a number, resulting in 1.4. It does not match the original equation.

"Six decreased by a number is equal to one and four-tenths." This choice represents a different equation, where six is decreased by a number, resulting in 1.4. It does not match the original equation.

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Trigonometry Pile Up!


How long is this side?


1.7 cm


71


21


1.7 cm


2.2 cm


4.3 cm


53


377


2.1 cm


42


3.2 cm


3.8 cm


3.6 cm


2.9 cm


2.5 cm


34


8 cm

Answers

The given options are 1.7 cm, 71, 21, 1.7 cm, 2.2 cm, 4.3 cm, 53, 377, 2.1 cm, 42, 3.2 cm, 3.8 cm, 3.6 cm, 2.9 cm, 2.5 cm, 34, and 8 cm.

The summary of the answer is that the length of the side is 2.2 cm.

In trigonometry, it is common to use the concept of a right triangle to relate the lengths of its sides with the trigonometric functions. However, without additional context or information about the triangle or the specific problem, it is not possible to determine the length of the side accurately.

Among the given options, the length of the side closest to 2.2 cm is 2.2 cm itself. Therefore, based on the options provided, we can conclude that the length of the side is 2.2 cm. However, it is important to note that without further information or context, this is an assumption based solely on the given options and may not be the correct answer in a different context or problem.

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Simplify this numerical expression using the order of operations. 5. 75 - 1 2 (20 ÷ 2. 5) ÷ 2 6 Order of Operations: 1. Evaluate within parentheses. 2. Evaluate exponents. 3. Multiply and divide from left to right. 4. Add and subtract from left to right. What is the value of the expression?.

Answers

The value of the given expression is approximately 71.31.

[tex]$$75 - 12(20 ÷ 2.5) ÷ 26$$[/tex]

The Order of Operations states that the sequence of steps in which we carry out the operations of a given problem.

So, we follow the Order of Operations to solve this expression.

Firstly, we will evaluate the parentheses:

[tex]$$20 ÷ 2.5 = 8$$[/tex]

Now, the given expression becomes:

[tex]$$75 - 12 × 8 ÷ 26$$[/tex]

Then, we will evaluate multiplication and division in order from left to right.

12 × 8 = 96

So, the given expression becomes:

[tex]$$75 - 96 ÷ 26$$[/tex]

Evaluating division, we get:

[tex]$$75 - 3.6923$$[/tex]

Now, we will add and subtract from left to right.

[tex]75 − 3.6923 ≈ 71.31[/tex]

Therefore, the value of the given expression is approximately 71.31.

So, the required  is approximately 71.31.

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Wallace works at the Computer Wholesale Warehouse, where he develops visual impressions of products for advertisements and marketing materials. What type of work does Wallace perform

Answers

The required, Wallace performs graphic design work at the Computer Wholesale Warehouse.

Based on the description provided, Wallace performs visual design or graphic design work at the Computer Wholesale Warehouse. He develops visual impressions of products for advertisements and marketing materials. This involves creating visual elements, such as graphics, images, and layouts, to effectively convey messages and promote products.

Wallace's role at the Computer Wholesale Warehouse involves performing visual design work to create captivating visual impressions of products for advertisements and marketing materials, contributing to the overall effectiveness of their promotional efforts.

Thus, the required, Wallace performs graphic design work at the Computer Wholesale Warehouse.

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Prove that the line joining the midpoint of a median to a vertex of the triangle trisects

the side opposite the vertex considered.​

Answers

The line joining the midpoint of a median to a vertex of a triangle trisects the side opposite the vertex considered.

Let's consider a triangle ABC with median AD and midpoint M of AD. We want to prove that line BM trisects the side AC at point N.

To prove this, we can use the following steps:

Draw line BM and extend it to meet side AC at point N.

Since M is the midpoint of AD, we have AM = MD.

By the midpoint theorem, we also know that BM is half of AD, so BM = MD.

Therefore, we have AM = MD = BM.

We also know that triangles ABM and NBC are similar by angle-angle similarity, since they share angle B and have angles ABD and CBN that are alternate interior angles.

This means that the corresponding sides are proportional, so we have: AB/BM = BN/NC AB/MD = BN/NC (substituting BM=MD)

Multiplying both sides by 2, we get: AB/AD = 2BN/NC

Since AD is a median, we know that AB/AD = 1/2.

Substituting this into equation from step 7, we get: 1/2 = 2BN/NC

Solving for BN, we get: BN = NC/2.

This shows that line BM trisects side AC at point N.

Therefore, we have proved that the line joining the midpoint of a median to a vertex of a triangle trisects the side opposite the vertex considered.

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In the funtion f(x)=1/x which of these could be a value of f(x) when x is close to zero

Answers

In the function f(x) = 1/x, when x is close to zero, the value of f(x) approaches positive or negative infinity. As x approaches zero from the positive side (x → 0+).

The function f(x) = 1/x becomes increasingly large and approaches positive infinity. This is because dividing a positive number by a very small positive number yields a very large positive result.

On the other hand, as x approaches zero from the negative side (x → 0-), the function f(x) = 1/x also becomes increasingly large but in the negative direction, approaching negative infinity. Dividing a negative number by a very small negative number yields a very large negative result.

However, it is important to note that the function f(x) = 1/x is undefined at x = 0 since division by zero is undefined in mathematics. Therefore, we say that the function has a vertical asymptote at x = 0, meaning that the function gets arbitrarily close to positive or negative infinity as x approaches zero, but it never actually reaches zero. In conclusion, when x is close to zero in the function f(x) = 1/x, the value of f(x) could be positive or negative infinity depending on whether x approaches zero from the positive or negative side, respectively.

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Calculate a 15% tip for a restaurant bill of $42.40. Remember to make sure that your answer is reasonable.

Answers

To calculate a 15% tip for a restaurant bill of $42.40, we multiply the bill amount by 0.15 to find the tip amount. The result will provide the tip amount, which can be added to the bill to get the total amount to pay. Therefore, a 15% tip for a restaurant bill of $42.40 is $6.36.

To calculate a 15% tip, we take 15% of the bill amount. The tip amount is found by multiplying the bill amount by the decimal equivalent of 15%, which is 0.15.

Given the restaurant bill of $42.40, we can find the tip amount by performing the calculation: $42.40 * 0.15 = $6.36.

Therefore, a 15% tip for a restaurant bill of $42.40 is $6.36.

To check if the answer is reasonable, we can consider the percentage amount and the total bill. A 15% tip is generally considered an average or moderate tip amount. Given the bill of $42.40, a tip of $6.36 seems reasonable in relation to the bill total.

However, tipping customs may vary in different regions or based on personal preferences. It is always advisable to consider the overall service quality and local tipping practices when determining an appropriate tip amount.

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Las aspas de un ventilador de techo están girando alrededor de un eje fijo estas parten del reposo con aceleración angular constante en un tiempo están girando 10 revoluciones por segundo y dan 60 vueltas después Irán a 15 revoluciones por segundo

Answers

The question provides that the blades of a ceiling fan rotate around a fixed axis and begin to rotate with a constant angular acceleration such that they are rotating at 10 revolutions per second after a certain period of time.

After 60 turns, the fan will be rotating at 15 revolutions per second.

Solution:The given data is:Initial angular speed, ω₁ = 0 (since they start from rest)

Final angular speed, ω₂ = 15 revolutions/sec

Angular acceleration, α = constant

Number of revolutions for the first part, n₁ = 60

Number of revolutions for the second part, n₂ = (total revolutions) - (n₁) = (60 + 10) - 60 = 10 revolutions

Using the formula for the angular velocity, ω = ω₀ + αt

and the formula for the number of revolutions, n = ωt / 2π

We can find out the time required to reach a final speed of 15 rev/s as follows:15 = 0 + αt ⇒ t = 15 / α

The total time required to reach a speed of 15 rev/s would be the sum of the time required to reach a speed of 10 rev/s and the time required to reach 15 rev/s.t = t₁ + t₂ ⇒ t₂ = t - t₁

We can find the value of t₁ from the formula for the number of revolutions during the first part of the motion as follows:n₁ = ω₁t₁ / 2π0 = αt₁² / 2 + ω₁t₁ / 2π ⇒ t₁ = 0

Using the formula for the number of revolutions, we can find the value of t₂ as follows:n₂ = (ω₁t₂ + 1/2 αt₂²) / 2π ⇒ t₂ = 20/α

The value of α can be found by equating the two formulas for t₂ obtained above:

20/α = 15 / α + t₁⇒ α = 100 / 3 rad/s²

We can now substitute this value in the formulas for t and t₂ to find the times required to reach speeds of 10 and 15 rev/s respectively.t₁ = 0 s, t₂ = 60 / 3 = 20 s

Answer: The time required for the blades of the ceiling fan to rotate with a constant angular acceleration before rotating at 10 revolutions per second is 0 seconds and the time required to reach a speed of 15 revolutions per second is 20 seconds.

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The starting numbers for the patterns for x and y are shown in the table below.
The blanks in the table represent the next four terms for each of the patterns.
• The rule for the x-values is add 3.
•The rule for the y-values is add 6.
X
y
0
0
Which graph represents the ordered pairs of the first five terms of the patterns
from the table?

Answers

The graph that represents the ordered pairs of the first five terms of the patterns from the table is the line graph.

The graph that represents the ordered pairs of the first five terms of the patterns from the table is the **line graph**.

The x-values in the table are increasing by 3 each time, while the y-values are increasing by 6 each time. This means that the ordered pairs are forming a straight line. The line graph is the only graph that shows a straight line.

The other graphs are either curves or not straight lines. The **scatter plot** shows a cloud of points that are not evenly distributed. The **bar graph** shows a series of vertical bars that are not evenly spaced. The **histogram** shows a series of horizontal bars that are not evenly spaced.

Here is a table of the first five terms of the patterns from the table, along with the corresponding ordered pairs:

X | Y | Ordered Pair

-- | -- | --

0 | 0 | (0, 0)

3 | 6 | (3, 6)

6 | 12 | (6, 12)

9 | 18 | (9, 18)

12 | 24 | (12, 24)

As you can see, the ordered pairs form a straight line.

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What score must a learner earn on the ACT composite test in order for the score to be at the 87.49th percentile? Round up to the nearest whole number.

Many students take standardized tests for college applications. They are called standardized tests because they are scored so the population of student scores for any one particular test follows a normal distribution. The most common test are the SAT and the ACT.

Suppose the mean and standard deviation for the ACT composite score, the SAT critical reading score, and the SAT mathematics score for the year 2017 are as follows:

For the ACT, the mean composite score was 21.0 with a standard deviation of 5.2.
For the SAT critical reading score, the mean was 501 with a standard deviation of 112.
For the SAT mathematics score, the mean was 516 with a standard deviation of 116
a. 32
b. 43
c. 27
d. 19

Answers

To find the score that corresponds to the 87.49th percentile on the ACT composite test, we can use the mean and standard deviation provided. Here's how we can calculate it:

1. Calculate the z-score corresponding to the desired percentile using the formula:
z = (x - mean) / standard deviation

2. Rearrange the formula to solve for x:
x = z * standard deviation + mean

3. Substitute the values into the formula:
z = invNorm(0.8749) (using a standard normal distribution table or calculator)
mean = 21.0
standard deviation = 5.2

4. Calculate the score:
x = z * standard deviation + mean

Using these steps, we can calculate the score:

z = invNorm(0.8749) ≈ 1.175

x = 1.175 * 5.2 + 21.0 ≈ 27.39

Rounding up to the nearest whole number, the score that a learner must earn on the ACT composite test to be at the 87.49th percentile is 28.

Therefore, the closest answer is C. 27.

Answer:

  27

Step-by-step explanation:

You want to know the ACT composite test score for the 87.49th percentile, given the ACT scores have a mean of 21.0 and a standard deviation of 5.2.

Z-score

The Z-table in the first attachment shows you the Z-value of the 87.49th percentile is 1.10+0.05 = 1.15.

Score

The corresponding score is ...

  X = μ +σZ

  X = 21.0 +5.2·1.15 ≈ 27

A learner must earn a score of 27 to be at the 87.49th percentile on the ACT composite test.

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Someone help me do this

Answers

Answer:

I believe it's A

Step-by-step explanation:

A one-kilogram cake is divided into 3 pieces whose weights are in the ratio 1:2:4. What is the weight of the second piece?


EXPLANATION ALONG WITH ANSWER NEEDED. Wrong answers and answers without explanation- will be reported.

Answers

Considering the ratio provided for cake pieces, the weight of the second piece of the cake is 2/7 kilograms.

Given that a one-kilogram cake is divided into 3 pieces whose weights are in the ratio 1:2:4.

We have to find the weight of the second piece.

Steps to find the weight of the second piece

Step 1: Let the three parts of the cake be x, 2x, and 4x respectively, where x is the weight of the first part of the cake.

Step 2: Find the total weight of the cake:

x + 2x + 4x = 7x

Total weight of cake = 7x

Total weight of cake = 1kg

Therefore,

7x = 1 kg

Or x = 1 / 7 kg.

Step 3: Find the weight of the second part of the cake (2x):

Weight of the second part of the cake = 2x

= 2 × (1 / 7)

= 2 / 7 kg.

Weight of the second part of the cake is 2/7 kilograms.

To conclude, the weight of the second piece of the cake is 2/7 kilograms.

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If a bike wheel covers a total of 69. 08 inches


after one complete rotation,what is the approximate radius of the bike wheel?

Answers

The approximate radius of the bike wheel is 11.0 inches.

If a bike wheel covers a total of 69.08 inches after one complete rotation, we can use the formula for the circumference of a circle to find the approximate radius of the bike wheel.

Circumference = 2piradius

where pi is approximately 3.14.

We are given that the circumference is 69.08 inches, so we can plug in these values and solve for the radius:

69.08 = 23.14radius

Dividing both sides by 2*pi, we get:

radius = 69.08 / (2*3.14) ≈ 11.0 inches

Therefore, the approximate radius of the bike wheel is 11.0 inches.

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