Pls help. quick

Timed***how else can the sequence for row 1 be written? notice: square a: 1 penny = 20 square b: 2 pennies = 21 square c: 4 pennies = 22 the sequence formed is geometric, with a1 = , and common ratio r = .

Can someone pls ! pls answer all. no explanation needed..

How many credit hours will a student have to take for the two tuition costs to be equal? round the answer to the nearest tenth of an hour.