A proportion is an equation that states that 2 ratios are equal.
Answer:
75π
Step-by-step explanation:
The formula for volume of a cone is
. If you substitute 5 into the radius and 9 into the height, you get 
y^2 - 24y + 100 = -100
(y^2 - 24y + 100) - 100 = (-100) - 100
y^2 - 24y = -200
y^2 - 24y +200 = 0
y = 12 + 2(√14i)
y = 12 - 2(√14i)
The area of the circle would be 0.97