In a car wash fundraiser, the money earned varies directly with the number of cars washed. If four cars are washed, $14 is made.. Determine how much
money is made when 15 cars are washed.

Adam drew two same size rectangles and divided them into the same number of equal parts. he shaded 1/3 of one rectangle and 1/4 of the other rectangle. what is the least number of parts into which both rectangles could be divided into?

Bring the fraction a/a-4 to a denominator of 16-a^2

Estimate the area under the curve f(x) = 16 - x^2 from x = 0 to x = 3 by using three inscribed (under the curve) rectangles. answer to the nearest integer.