3 years ago

How do you use numerical expressions to solve real world problems

Mathematics

1 answer:

Sonja [21]3 years ago

4 0

Ask your teacher .... no kidding but really just convert the numbers

You might be interested in

A bag contains 10 white gumballs and 12 orange gumballs.

Fed [463]

$10+12=22 \\ \frac{10}{22} 10:22 \\ 10/2=5 \\ 22/2=11 \\ \frac{5}{11} \frac{5}{11}$ 5:11

4 0

3 years ago

Read 2 more answers

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

bagirrra123 [75]

Answer:

A sample of 18 is required.

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:

$\alpha = \frac{1 - 0.92}{2} = 0.04$

Now, we have to find z in the Z-table as such z has a p-value of $1 - \alpha$ .

That is z with a pvalue of $1 - 0.04 = 0.96$ , so Z = 1.88.

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 standard deviation was 2.2 days.

This means that $\sigma = 2.2$

How large a sample must be selected if the company wants to be 92% confident that the true mean differs from the sample mean by no more than 1 day?

This is n for which M = 1. So

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

$1 = 1.88\frac{2.2}{\sqrt{n}}$

$\sqrt{n} = 1.88*2.2$

$(\sqrt{n})^2 = (1.88*2.2)^2$

$n = 17.1$

Rounding up:

A sample of 18 is required.

3 0

3 years ago

Highlight (1) Calculator

melisa1 [442]

Answer- 16
explanation- that’s what it is

4 0

3 years ago

How do you write 0.0036 in scientific notation

Diano4ka-milaya [45]

3.6 * 10^(-3) is the scientific notation

5 0

3 years ago

Read 2 more answers

What is the result when the number 4 is decreased by 25%?

OleMash [197]

4/4=1. So we need to subtract 1 from 4 to get the final Answer which is 3.

6 0

3 years ago

Read 2 more answers