PLEASE HELP!

Find the angle KLM

The equation respenting the left table is

What is the point-slope equation of a line with slope -5 that contains the point (6,3)

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%