Given f(x) =5x^2-4 and g(x)=-1/2"x^2, find the following expressions.

What is f(3) for the quadratic function f(x)= 2x^2+ + x - 12

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.

The ph level of a blueberry is 3.1 what is the hydrogen-ion concentration [h+] for the blueberry