If the end behavior is increasing on the left and decreasing on the right, which statement must be true about the function

Solve for x, y, and z. show all steps.

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%

1yd 1 ft = 1 1/12 1 1/3 1 1/2 1 1/6