Amy volunteers at an animal shelter. She worked 10 hours in March, 14 hours in April, 18 hours in May, and 22 hours in June. If the pattern continues, how many hours will she work in December?

2people are trying different phones to see which one has the better talk time. chatlong has an average of 18 hours with a standard deviation of 2 hours and talk-a-lot has an average of 20 hours with a standard deviation of 3. the two people who tested their phones both got 20 hours of use on their phones. for the z-scores i got 1 for the chatlong company and 0 for talk-a-lot. what is the percentile for each z-score?

What is always true when two whole numbers are subtracted?

Simplify the following expression 48^1/2