2. The lengths in minutes of nine music CDs are 45, 63, 74, 69, 72, 53, 72, 73, and 50.
a. Find the mean.
b. Find the deviation from the mean for each value
c. Find the standard deviation of the data set.
d. What are the units of the mean, the deviations
from the mean, and the standard deviation?

28

step-by-step explanation:

because that's the answer

p ÷ r = tan(x)

step-by-step explanation:

given that there is a figure below shows a right triangle: a right triangle is shown with hypotenuse equal to q units and the length of the legs equal to p units and r units.

graph is missing so i will create the graph as per given information.

the angle between the legs having lengths p units and q units is y degrees. the angle between the legs having lengths r units and q units is x degrees.

now we need to find about what is p ÷ r equal to.

so we can use trigonometric ratio tan(x)=[altitude]/[base] to find the value of p ÷ r, because p is the altitude and r is the base.

p ÷ r=tan(x)

hence final answer is p ÷ r=tan(x).