How much do you make annually at 15 dollars an hour 23 hours a week?

Mathematics

2 answers:

ahrayia [7]3 years ago

4 0

You multiply $15 by 23 which is 345. Then you multiply 345 by 52 for there is 52 in a year. The answer $17940.

Vitek1552 [10]3 years ago

3 0

Since there are 52 wks in a month the answer is
52*15*23=$17940

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The heights of three Russian dolls are in the ratio 7: 11: 13. Rewrite this as an equivalent ratio of the form 1 m: n. Give any

Nina [5.8K]

The equivalent ratio of the heights of three Russian dolls are 1: 1.57: 1.86.

<h3>What is a ratio?</h3>

It is important to note that a ratio demonstrates how many times one number can fit into another number as they contrast two numbers by ordinarily dividing them.

In this case, the heights of the dolls are given in the ratio 7: 11: 13

Based on the information, the ratio will be illustrated thus:

7/7 = 1

11/7 = 1.57

13/7 = 1.86

This illustrates the ratio of the dolls.

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zavuch27 [327]

Answer:

The bottom for an A is 75. Round to the nearest whole number as needed.

Step-by-step explanation:

1) Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".

Let X the random variable that represent the scores on this case, and for this case we know the distribution for X is given by:

$X \sim N(\mu=73,\sigma=7)$

And let $\bar X$ represent the sample mean, the distribution for the sample mean is given by:

$\bar X \sim N(\mu,\frac{\sigma}{\sqrt{n}})$

2) The bottom for an A is _____. Round to the nearest whole number as needed.

And we want the top 5.5% of the scores, so we need a value a such that:

$P(X>a)=0.055$ or $P(X$

We need on the right tail of the distribution a value a that gives to us 94.5% of the area below and 5.5% of the area above. Both conditions are equivalent.

Let's use the condition $P(X$ , the best way to solve this problem is using the z score with the following formula:

$z=\frac{x-\mu}{\sigma}$

So we need a value from the normal standard distribution that accumulates 0.945 of the area on the left and 0.055 on the right. This value on this case is 1.598 and we can founded with the following code in excel:

"=NORM.INV(0.945,0,1)"

If we apply the z score formula to our case we have this:

$P(X$