In order to calculate standard deviation, apply the standard deviation formula, which is given in the attached file. In this formula, we are finding the square root of the sum of the square of given values less their mean value (the sum of the given numbers divided to their amount) divided to N-1, where N is the amount of the given numbers. When we calculate the mean, it is 42.7 and the standard deviation is 10.02275

5 0

4 years ago

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While at the music store, Drew bought 5 CDs, all at the same price. The tax on his purchase was $6, and the total was $61. What

mylen [45]

Let, the price of CD = x

then, 5x+6 = 61

5x = 55

x = 11

so, price of CD was $11

6 0

3 years ago

Perform the indicated operation. Be sure the answer is reduced.

ANTONII [103]

$\frac{m}{n} . \frac{n}{p} \div \frac{p}{q} \\ = \frac{m}{p} \div \frac{p}{q} \\ = \frac{m}{p} . \frac{q}{p} \\ = \frac{mq}{ {p}^{2} }$

Hope it helps...

Regards;

Leukonov/Olegion.

8 0

3 years ago

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3/4 divided by 2/3 using fractions

mr_godi [17]

To solve this divition we can write it like:

$\frac{\frac{3}{4}}{\frac{2}{3}}$

So now we can multiplicate the numerator of the first fraction with the denominatior of the second fraction, and put the resould in the numerator of the quationt, ans the same operation for the numeratior with the numerator of the secon fraction and the denominator of the first fraction so:

$\frac{3\cdot3}{4\cdot2}=\frac{9}{8}$

8 0

2 years ago