Simplify the following radical:
84

The volume of gas a balloon can hold varies directly as the cube of its radius. imagine a balloon with a radius of 3 inches can hold 81 cubic inches of gas. how many cubic inches of gas must be released to reduce the radius down to 2 inches?

Use composition to determine if (x) or h(x) is the inverse of f(x) for the limited domain x2-1.

Use sigma notation to represent the following series for 9 terms.