Acircular garden has a diameter of 12 ft how many bags of topsoil must linda buy to cover the garden if one bag covers an area of 3 square feeta. 13b. 28c. 40d. 151

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%