$28 is what percent of $70

Simplify the expression. enter the correct answer.

The radius of a sphere is 3 inches. which represents the volume of the sphere?

If f(x) = 4 - x2 and g(x) = 6x, which expression is equivalent to (g-f)(3)? 06-3-(4 + 3)2 06-3-(4-33 6(3) - 4 +32 6(3) -4 -32