A sequence is defined recursively by a1=4

an=34an−1

What is the explicit form of this sequence?

a(n)=4⋅34(n−1)

a(n)=4(34)n

a(n)=4+34n

a(n)=4(34)n−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