Answer:
224 cubic inches
Explanation:
It's a prism.
The formula of a volume of a prism:

B - area of a base
H - height
We have a triangle in the base.
The formula of an area of a triangle:

b - base
h - height
We have b = 4in, h = 7in.
Substitute:

Put the value of a base B = 14 in² and the height H = 16 in to the formula of a volume:
