Answer:
288 ft³
Explanation:
The formula of a volume of a prism:
![V=BH](https://img.qammunity.org/2021/formulas/mathematics/middle-school/huc96j6g74735xn6ajzbno8f6tpvu5did6.png)
where
B - area of a base
H - height of a prism
In the base we have the right treiangle. The formula of an area of a right triangle is:
![A=(ab)/(2)](https://img.qammunity.org/2021/formulas/mathematics/high-school/7zw6658s5v7s81cbca9xrssqo4lovkp4xe.png)
where
a, b - are legs
We have
![a=6\ ft,\ b=8\ ft](https://img.qammunity.org/2021/formulas/mathematics/high-school/9ee6x1e8wg1zbiv6wos2eep2544qg9eroo.png)
Substitute:
![B=((6)(8))/(2)=(48)/(2)=24\ ft^2](https://img.qammunity.org/2021/formulas/mathematics/high-school/p6ptb675d3x94pbnf5jmlul236m79njioc.png)
Calculate the volume.
Substitute
![B=24\ ft^2,\ H=12\ ft](https://img.qammunity.org/2021/formulas/mathematics/high-school/m6j47uju0yxapczyg64hpajs4y0ifusrp6.png)
![V=(24)(12)=288\ ft^3](https://img.qammunity.org/2021/formulas/mathematics/high-school/b4lk09lpl6dop79xlgoinz56kzwzk7nzqk.png)