A, 11,696. 9308x3 (per year) x4 (4 years)
This is an example of the commutative property of addition. This is because changing the addends or factor's does not affect the sum or product.
The volume of a cube is just cubing one side (1 times one times 1). So you just count up the cubes I guess!
Answer is -15 5×-3 = -15.