If cos 0 = 1/2, find the degree measure of 0.​

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%

Ab based on the given diagram, if m_1 = 60° then m 2 = 30 60 90 180

What number line represents the solution set for the inequality -1/2 greater than or equal to 4