Answer
96 inches cubed
Step-by-step explanation:
Ok, same way of solving then. Just with a few more useless numbers. Take rectangular prism A, 6in x 3in x 3in, you will get 54in^3.
Then take prism B, 2in x 3in x 7in, you will get 42in^3.
Finally, take those two numbers, add them, and you end up with 96in^3
