What is the effect on the graph of the function () = 1 when () is replaced with 4() − 9? a) compressed vertically and shifted 9 units up b) stretched vertically and shifted 9 units down c) compressed vertically and shifted 9 units left d) stretched vertically and shifted 9 units 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.

What could explain what happened when the time was equal to 120 minutes

Just tell me how to set up the equation.