I need help finding the hypotenuse this all I need this is the last question for this assignment

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.

Which point on the x-axis lies on the line that passes through point c and is parallel to lino ab?

How much dextrose 70% must be mixed with dextrose 5% to prepare 1,000 ml of dextrose 20%?