Write five and eight tenths in standard decimal form

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 sr is 4.5cm and tr is 3cm, what is the measure in degrees of angle s?

What is the quotient of m^6/5 ÷ 5/m^2? assume m does not equal pl