This Is 7th grade math need help

The physical fitness of an athlete is often measured by how much oxygen the athlete takes in (which is recorded in milliliters per kilogram, ml/kg). the mean maximum oxygen uptake for elite athletes has been found to be 60 with a standard deviation of 7.2. assume that the distribution is approximately normal.

Is a positive integer raised to a negative power always positive

What is the result of converting 60 ounces to pounds remember there are 16 ounces in a pound