Answer:
8 and 6 is the answer.......
I honestly don't know any of this so
This would be A because $100 is the initial amount, and you are adding the amount that arises after (d) days. Since you are adding, it will be the sum. B says product, so you can rule it out. D says difference, so you can rule that out as well. C would be adding the days, not the amount earned each day.
The area is perimeter times height plus area of the bases