How to put (x+1)(x+1)(x-1) in standard form

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.

What is a rational number between 9.5 and 9.7

Inez has a phone card. the graph shows the number of minutes that remain on her phone card a certain number of days.