WHAT MATH SKILL IS THIS

Math: Question 21 Anght rectangular prism has a height of 9 inches. The length of the prism's base is x inches, which is 7 inches more than the width of the prism's base. Which function V gives the volume of the prism, in cubic inches, in terms of the length of the prism's base? Answer A. Via) = 2(2 + 9)(2 +7) B. V(x) = x(x + 9)(2 - 7) C. V2) = 9e(2 + 7) D. Via) = S2{2 7) You selected answer C. The correct answer is D