Is 3 tenths multiplied by 100 equal 300 thousandths

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%

If y varies directly as x2 and y=6 when x=6, find the constant of variation.

Why is studying fractions important