Hey!
The formula for finding volume of a cone is: (π · r² · h) ÷ 3
[tex] \pi [/tex] = 3.14
[tex] r = 7 \\ r^{2} = 7 \times 7 = 49 [/tex]
[tex] h = 12 [/tex]
Now multiply
[tex] 3.14 \times 49 \times 12 = 1846.32 [/tex]
The volume of the cone is:
[tex] 1,846.32\ ft^{3} [/tex]
Good luck and hope this helps! :)