The answer you want is a = -7
Answer:
36.56
Step-by-step explanation:
the area of a circle is r^2×pi (here 2^2×pi) then add the area of the middle rectangle (so 4×6)
It will be 1.52 or 1.5206349206
1. 7
2. 2
3. not sure
4. not sure
5. 1,000
6. 350
7. 40
8. 14