What fraction of £1 is seventy pence?

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%

Valentina is subtracting from . she finds the lcd to be 15y2. what is valentina's next step?

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.