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3 years ago

Martin runs 100 meters in 15 seconds. What is the equation for d, the distance in meters that Martin covers per second.

Mathematics

1 answer:

Ivahew [28]3 years ago

6 0

Answer:i am not exactly sure but it should be three feet in each meter so mabey that should help you figure it out

Step-by-step explanation:

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victor needs 300 feet of rope.The rope he wants to buy is sold by yards.He knows that there are 3 feet in 1 yard.How many yards

barxatty [35]

We need to convert 300 feet to yards.

We know,

3 feet = 1 yard

Hence,

300 feet * 1 yard/3 feet = 300/3 = 100 yards

He should buy 100 yards

5 0

1 year ago

Please I need this answered as quickly as you can!!

ozzi

Answer:

the answer is C

Step-by-step explanation:

6 0

3 years ago

you deposit 1,750 into an interestmemt account that will produce 6.05% annual interest the money was left in the account for 2 y

Ymorist [56]

Answer:

i dont know mabey someone else knows

5 0

3 years ago

Find the measure of angle A. 4x 135° 5x A

Mkey [24]

<h2>Using this equation:</h2>

 $4 \times + 5 \times + 135 = 180$ 

<h2>We can solve for X:</h2>

 $9 \times + 135 = 180 \\ 9 \times = 45 \\ \times = 45$ 

<h2>Multiply this value of x to 4 and 5 to get the other two angels.</h2>

8 0

2 years ago

In order to set rates, an insurance company is trying to estimate the number of sick days that full time workers at an auto rep

son4ous [18]

Answer:

D. 31

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1 - 0.95}{2} = 0.025$

Now, we have to find z in the Ztable as such z has a pvalue of $1 - \alpha$ .

That is z with a pvalue of $1 - 0.025 = 0.975$ , so Z = 1.96.

Now, find the margin of error M as such

$M = z\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

A previous study indicated that the population standard deviation is 2.8 days.

This means that $\sigma = 2.8$

How large a sample must be selected if the company wants to be 95% confident that the true mean differs from the sample mean by no more than 1 day?

This is n for which M = 1. So

$M = z\frac{\sigma}{\sqrt{n}}$

$1 = 1.96\frac{2.8}{\sqrt{n}}$

$\sqrt{n} = 1.96*2.8$

$(\sqrt{n})^2 = (1.96*2.8)^2$

$n = 30.12$

Rounding up, at least 31 people are needed, and the correct answer is given by option D.

5 0

3 years ago