Answer: Let's use the formula for the volume of a rectangular prism to solve for the height of the aquarium:
V = lwh
where V is the volume, l is the length, w is the width, and h is the height.
We are given that the volume of the aquarium is 1120 cubic inches, the length is 20 inches, and the width is 8 inches. So we can plug in these values and solve for the height:
1120 = 20 * 8 * h
Simplifying the right-hand side:
1120 = 160h
Dividing both sides by 160:
h = 7
So the height of the aquarium is 7 inches.
Explanation: