How many pixels are there? i got 214.5 but i dont know if im right

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.

One card is dealt from a 52 card deck. find the probability that the dealt card is a 4 or a black 7

Simplify the expression 10/11(22z) + (a+5) -1