Suppose the colored region is removed from the drawing below. What is the area of the remaining part?
A. 40 inches
B. 38.4 inches
C. 20 inches
D. 12.8 inches

Answer:
(1/2)(10)(4) - (1/2)(2.4)(6) = 20 - 7.2 = 12.8 in.²
The correct answer is D.