To figure out the answer, we need to find the total area of the rectangle, and then subtract the blank shape.
Lets first find the area of the rectangle. 4x10=40
Lets now find the area of the blank shape. We fill caculate the area of the circle and then divide by 2 because it is a half circle. 4/2=2. 2x2=4. 4x3.14= 12.56/2=6.28
