A student uses the method of successive approximations to estimate a positive solution of f(x) = g(x), where f(x) = x2 +10 and g(x) = 2x + 17. The table shows her results for diferent input values of x

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%