In 1985, there were 852 cell phone subscribers in the small town of Centerville. The number of subscribers increased by 25% per year after 1985. Write an equation to represent this situation.

Darcy deposited $390 into a savings account. as long as the account balance remains at or above $150, she does not have to pay a service fee for the account. for how many months can she withdraw $40 a month without having to pay service fees? a) 3 b) 5 c) 6 d) 9