Need help best answer with explanation gets brain list

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.

This race was first held in 1953 on august 16th. every decade the race finishes with a festival. how many years is this?

The hawaiian alphabet has 12 letters. how many permutations are posible for each number of letters?