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4 years ago

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The equation y=15x+60 represents the total cost y,the security fee,and The hourly rate for renting a tool for x hours .Make a ta

ble of values that can be used to determine the total cost for renting a tool for 1,3 and 5 hours

1 answer:

Tamiku [17]4 years ago

7 0

Here is a table that will help you understand. And the answer.

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1. Which is greater than 4?<br><br> (a) 5,<br><br> (b) -5,<br><br> (c) -1/2,<br><br> (d) -25.

Gala2k [10]

Answer:

(a) 5

5 is greater than 4

5 0

3 years ago

Read 2 more answers

A random sample of medical files is used to estimate the proportion p of all people who have blood type B. (a) If you have no pr

GaryK [48]

Answer:

a) 752 medical files should be included.

b) 372 medical files should be included.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the z-score that has a p-value of $1 - \frac{\alpha}{2}$ .

The margin of error is of:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

90% confidence level

So $\alpha = 0.1$ , z is the value of Z that has a p-value of $1 - \frac{0.1}{2} = 0.95$ , so $Z = 1.645$ .

Question a:

This is n for which M = 0.03. We have no estimate, so we use $\pi = 0.5$ . So

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$0.03 = 1.645\sqrt{\frac{0.5*0.5}{n}}$

$0.03\sqrt{n} = 1.645*0.5$

$\sqrt{n} = \frac{1.645*0.5}{0.03}$

$(\sqrt{n})^2 = (\frac{1.645*0.5}{0.03})^2$

$n = 751.67$

Rounding up:

752 medical files should be included.

Question b:

Now we have that:

$\pi = \frac{13}{90} = 0.1444$

So

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$0.03 = 1.645\sqrt{\frac{0.1444*0.8556}{n}}$

$0.03\sqrt{n} = 1.645\sqrt{0.1444*0.8556}$

$\sqrt{n} = \frac{1.645\sqrt{0.1444*0.8556}}{0.03}$

$(\sqrt{n})^2 = (\frac{1.645\sqrt{0.1444*0.8556}}{0.03})^2$

$n = 371.5$

Rounding up:

372 medical files should be included.

8 0

3 years ago

The coordinates of the vertex of a rectangle or -2, 34, 34, -4 and -2, -4 what are the dimensions of the rectangle

denis23 [38]

-2, 34, 34, -4 and -2, -4

Answer:

the other one is (34, 34)

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3 years ago

How to know when to use c2=a2+b2 or a2+b2=c2 in a question that doesnt have a shape

Viefleur [7K]

Step-by-step explanation:

A flagpole is 53 feet tall. Most of the time, this will be a vertical side of the triangle.

The flagpole and the ground are perpendicular to each other so they should form the legs of the triangles, this the triangle will be a right angle.

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2 years ago

I need help fast please

Mademuasel [1]

306 cause 2448divided by 8

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3 years ago