Can someone help me?

Answer:
Volume of a Rectangluar Prism: 288 ft
Volume of triangular prism: 12 ft
Volume of composite figure: 300 ft cubed (^3)
Step-by-step explanation:
Volume of a Rectangluar Prism: V=lwh
[tex]4 \times 6 \times 12 = 288[/tex]
Volume of triangular prism: For this instance, we'll use V=1/2bh
[tex] \frac{4 \times 6}{2} = 12[/tex]
The volume of the composite figure is the total of the volumes added
[tex]288 + 12 = 300ft ^{3} [/tex]