A bike wheel has a diameter of 21 in. What is the circumference of
the tire? Use 22/7 for π

Ineed with number 17 i don’t get it at alll

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.

Which of these tables represents a non-linear function?