Jaime decides to build an accessibility ramp to help students reach the top of a set of stairs in which the length and height of the steps are the same. If BI is 24 ft and AB is 9 ft, what is the measure of the angle of elevation?

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%