What is the pattern and sequence of 63,58,53,48

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.

Iam at home. /: i am playing video games. translate the following statement into symbolic form.

Find the distance between c and d on the number line c=3 and d=11