You would start by finding the area of the circle and then finding the area of the rectangle. After finding both, subtract the area of the rectangle from that of the circle. <span />
Convert to:
42 4 168
---- x ---- = ------
1 7 7
The answer is a! i hope this helps you!
I would say the third asnwer, so 90 degrees :)
4x+2y i hope that helps :3
