The radius of a circle is 26 yards. Find the diameter

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%

The radius of the earth is two times the radius of the moon. what fraction of the volume of the earth is the volume of the moon?

Select all the statements that apply to this figure