3 years ago

a laptop was originally sold for $975. The laptop is now on sale for $828.75. what is the percent markdown?

Mathematics

2 answers:

k0ka [10]3 years ago

8 0

Answer: The markdown is 15%

zloy xaker [14]3 years ago

6 0

Answer: 15%

Step-by-step explanation:

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Write the equation of a line in slope-intercept form that goes through the points (-4, 3) and (-5, 1). Show your work.

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M=1-3/-5-4
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Read 2 more answers

Suppose the population standard deviation is σ = 5 , an SRS of n = 100 is obtained, and the confidence level is chosen to be 98%

beks73 [17]

Answer:

1.165.

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:

$\alpha = \frac{1-0.98}{2} = 0.01$

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

So it is z with a pvalue of $1-0.01 = 0.99$ , so $z = 2.33$

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.

In this problem, we have that:

$\sigma = 5, n = 100$ . So

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

$M = 2.33*\frac{5}{\sqrt{100}} = 1.165$

So the correct answer is:

1.165.

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3 years ago