Is 5 and four fifths = 5.8

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%

The final cost of a sale is determined by multiplying the price on the tag by 75%. which best describes the function that represents the situation?

Find the distance between (0,5) & (-4,2)