Need asap will mark brainliest/ i don’t understand

answer choices:

a. 5
b. 6
c. 7
d. 8

Hannah works at the mall selling book bags. she sold 35 book bags in 5 hours. how many book bags did she sell per hour?

Precalculus question, image attached.

Diane’s bank is offering 5% interest, compounded monthly. if diane invests $10,500 and wants $20,000 when she withdrawals, how long should she keep her money in for? round to the nearest tenth of a year.