What are the domain and range of f(x)=log(x+6)-4
O domain: x>-6; range y> 4
O domain: x>-6; range: all real numbers
O domain. x > 6; range:y> -4
O domain: x > 6; range: all real numbers

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%