PLEASE HELP - A cinder block is in the shape of a rectangular prism. The cinder block has two holes shaped like rectangular prisms that are the same size and pass completely through it.
16 in.
8 in.
5 in.
5 In.
8 In.
What is the volume of the cinder block?
O A 624 cubic inches
OB. 824 cubic inches
O C. 1024 cubic inches
D. 1424 cubic inches

your answer would be 12

the revenue of the fitness center, y, is the product of two factors: the number of members and the fee paid by each member. there are 320 members now, but number of members goes down by 10 for each $5 increase in fees, so if x is the number of $5 price increases then members is equal to (320 - 10x). since the fee is currently $45, and the fee increases by $5 for every price bump x, the fee is given by (45 + 5x). so, revenue y is given by y = (320 - 10x)(45 + 5x).