The area of a trapezoid is calculated by the equation, A = 0.5(b₁ + b₂)h where b₁ and b₂ are the bases and h is the height. When we substitute the given expression for the dimensions in the given, A = 0.5(4x + 2x)(x - 6) A = 0.5(6x)(x - 6) = 3x² - 18 Thus, the answer is letter A.
The volume of a crate is b x l x h. Reverse it to get 3 times 6 times h = 72. 3 times 6 is 18, so you know 18h=72. Divide both sides by 18 to get h = 4 ft.
