The sum of two numbers is 56 the difference is 4 find the two numbers

What is the exact volume of the cylinder 1.5 m 2.5 m

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 difference of two numbers is 40. find the numbers if 0.3 parts of one number is equal to 37.5% of the other one.