The volume of cubical shipping box is 1 cubic foot more than the volume of cubical shipping box A. The edge length of targer box is 0.4 feet less than twice the edge length of the smaller box What is the approximate edge length of the larger box? Use a graphing calculator to help you determine the 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%