Answer:
378
Step-by-step explanation:
The base is a right triangle. First, find the area of the triangle.
[tex]A=\frac{1}{2}(base)(height)[/tex]
The base and height always are perpendicular, so use the 9 and the 12.
[tex]A=\frac{1}{2}(9)(12)[/tex]
[tex]A=54[/tex]
Now multiple the base area by the height of the overall prism, which is 7
[tex]V=(54)(7)[/tex]
[tex]V=378[/tex]
