Find the exact value of tan A in simplest radical form.

How do you find principle and simple interest

The first-serve percentage of a tennis player in a match is normally distributed with a standard deviation of 4.3%. if a sample of 15 random matches of the player is taken, the mean first-serve percentage is found to be 26.4%. what is the margin of error of the sample mean? a. 0.086% b. 0.533% c. 1.11% d. 2.22%

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'