Heyy wsp ppl what are u all doing ?:)

In the diagram below what is the approximate length of the minor arc ab

Find the value of the variable and the length of each secant segment

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.