A person sees two boats in the bay and is interested in determining the distance between them. He has the opportunity to locate two points on the beach, C and D 1480 meters apart. Using the other data shown in the illustration, determine the distance between the boats.

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%