the answer is in your question lol.
its pi, which is
≈ 3.14 feet ^3
^^^ thats
ur answer
686 barrels left. If I'm not mistaken this should just be simple subtraction
(-2,3) to (2,-3)
6^2 + 4^2 = c^2
c = 7.21
————
(-2,3) to (1,5)
2^2 + 3^2 = c^2
c = 3.61
————
3.61 * 7.21 = approx. 26.03
The area is 26.03un^2
Yea, there's a formula :
radians = degrees × π / 180°