Which exponential equation is equivalent to this logarithmic equation?

What is (28 + 7 + 6 + 3) x 1/2 show your work

What is a rational number between 9.5 and 9.7

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%