Answer asap! marking the value of x must be greater than

What is the size of the matrix resulting from

Consider circle h with a 3 centimeter radius. if the length of minor arc what is the measure of zrst?

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%