From another point F, Clay measures 20 meters to D and 50 meters to E. Reece says that last summer this area dried out so much that he could walk the 49 meters from D to E. What is the measurement of Angle F? Round intermediate results to 3 decimal places and the final answer to 1 decimal place.

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%