The volume \( V \) of a cone can be calculated using the formula:
\[ V = \frac{1}{3} \pi r^2 h \]
where \( r \) is the radius and \( h \) is the height.
Given:
- Radius \( r = 4 \) ft
- Height \( h = 9 \) ft
- \( \pi = 3.14 \)
Now plug in the values:
\[ V = \frac{1}{3} \times 3.14 \times (4)^2 \times 9 \]
Calculating \( (4)^2 \):
\[ (4)^2 = 16 \]
Now plug this back into the formula:
\[ V = \frac{1}{3} \times 3.14 \times 16 \times 9 \]
Calculating \( 16 \times 9 \):
\[ 16 \times 9 = 144 \]
Now plug it back in:
\[ V = \frac{1}{3} \times 3.14 \times 144 \]
Now calculate \( 3.14 \times 144 \):
\[ 3.14 \times 144 = 451.68 \]
Now divide by 3:
\[ V = \frac{451.68}{3} \approx 150.56 \]
Therefore, the volume of the cone is approximately \( 150.56 \) cubic feet.