help me with 2 and 4

Answer:
I only have number 2 but it's C
Step-by-step explanation:
You have to multiply 18.25 3 times since volume of cube is length * width * height
so for the first one you do 18.25^3 which is 6,078.39 cubic inches , the reason it's cubic is volume is always cubic , for the second one square is related to the area while cube is volume. I hope it helps :)