Answer:
109 mm
Step-by-step explanation:
The question is asking us to subtract the area of the shaded rectangle, including the unshaded portion, and subtract the area of the unshaded portion from that. So you'll want 16 * 9 = 144. So 144 is the area of the whole thing. Then we need the area of the non-shaded portion. 7 * 5 is 35. Then, subtract 144 minus 35 and get 109 mm as your answer. Don't forget to label millimeters!
