Find the area of an equilateral triangle (regular 3-Gon) with a given measurement

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 of the following expressions is equal to 2x^2+8

If a is a nonzero real number then the reciprocal of a is