Find the volume of a cone with a base radius of 5 ft and a height of 12 ft. Write the exact volume in terms of it, and be sure to include the correct unit in your answer.

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%