Hope u all have a nice sleep at the end of the day

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%

Micheal is 4 times as old as brandon and is also 27 years older than brandon. how old is micheal

Which equation can be solved to find x the measure of jk in the apex