3 years ago

PLS HELP 10 POINTS ASAP RN PLSSSSS OR I WILL FAIL CLASS

Mathematics

1 answer:

Ivahew [28]3 years ago

7 0

A is .898 B is 1 and C is 1.009

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a computer store bought a program at a cost of $10 and sold it at a selling price of $14. Find the percent markup.

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The percent markup would be 40%. 10+40%=14

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What is -15x=0 solution

cricket20 [7]

Here is the method for solving that equation:

Step #1: Write the equation:

-15x = 0

Step #2: Divide each side of the equation by -15 :

<u>x = 0</u>

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Using the z-distribution, it is found that the lower bound of the 99% confidence interval is given by:

d. 68.39%.

<h3>What is a confidence interval of proportions?</h3>

A confidence interval of proportions is given by:

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

In which:

$\pi$ is the sample proportion.

z is the critical value.

n is the sample size.

In this problem, we have a 99% confidence level, hence $\alpha = 0.99$ , z is the value of Z that has a p-value of $\frac{1+0.99}{2} = 0.995$ , so the critical value is z = 2.575.