8 x 9 = 72
So 72 is your answer
To find the circumference of a round object, you will take the diameter and multiply is by pi to get 78.5mm
X^2 - 8x + 13 = 0
subtract 13 from both sides
x^2 - 8x = -13
-8/2 = -4, (-4)^2 = 16, add 16 to both sides
x^2 - 8x + 16 = -13 + 16
factor the left side
(x - 4)^2 = 3
V = LWH.....to find W, divide both sides by LH
V / LH = W <===