Hannah can paint a room in 9 hours. destiny can paint the same room in 15 hours. how long does it take for both hannah and destiny to paint the room it they are working together?

What is 20+(5 x 2/5 )+ 3 show your work

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%

Find the ratios of the corresponding sides