Benjamin is doing some remodeling at his home. he currently has a triangular patio that has a base that is two times as long as its height. he wants to increase the length of the base of the patio by 4 feet and the length of the height of the patio by 9 feet. if x represents the height of the patio, which of the following functions will give the area of the new patio? a. f(x) = x2 + 11x + 18 b. f(x) = x2 + 8.5x + 18 c. f(x) = 2x2 + 36 d. f(x) = 2x2 + 22x + 36