Answer:
V = 1017.88 cm²
Step-by-step explanation:
[tex]V=\pi r^{2} \frac{h}{3}[/tex] Use the equation for volume of a cone and use 9 as the radius
[tex]V=\pi 9^{2} \frac{12}{3}[/tex] Simplify the exponent and divide
[tex]V=\pi (81)(4)[/tex] Multiply
V = 1017.88 cm²
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