Step-by-step explanation:
- shapes are a pyramid and rectangular prism
finding volume of pyramid
[tex] \frac{1}{3} (12 \times 18)(13) \\ \frac{1}{3} (216)(13) \\ \frac{1}{3} (2808) \\ 936 {ft}^{3} [/tex]
volume of the rectangular prism
[tex](12)(18)(11) \\ (216)(11) \\ 2376 {ft}^{3} [/tex]
volume of the shape
[tex]936 + 2376 \\ 3312 {ft}^{3} [/tex]
