Can anyone help me with these two questions?

16a, 20ab

25cd, 10d

Scott harris can invest $7,000 in a 1-year cd that earns interest at an annual rate of 4 percent compounded monthly. the amount per $1.00 is 1.040742. he can also invest $7,000 in a 1-year cd at annual rate of 4 percent compounded quarterly. the amount per $1.00 is 1.040604. what is the difference in the amount of interest earned for each investment? a) $0.96 b) $0.81 c) $0.87 d) $0.88

Matt had 5 library books. he checked out 1 additional book every week without retuening any books. whats the matching equation

92ft long and 48 wide resurface 2.75$