Suppose a city with population 400,000 has been growing at a rate of ​6% per year. If this rate​ continues, find the population of this city in 20 years.

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