You and your best friend decide to go out for dinner. Together you spend $22. Your friend
spends eight dollars less than twice what you
spend on food. How much your dinner cost?
(Please give a verbal model, algebraic model, and solve)

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.

Acredit card advertises an annual interest rate of 23%. what is the equivalent monthly interest rate?

What is the total area of the figure?