In exponential growth functions, the base of the exponent must be greater than 1. How would the function change if the of the exponent were 1? How would the function change if the base of exponent were between 0 and 1?

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