Answer:
you have just after you make the 5th deposit is $18369
Explanation:
Given data
time t = 5 year
principal p = $3100
rate r = 8.5% = 0.085
to find out
how much you have just after you make the 5th deposit
solution
we will apply here future value formula that is
Future value = principal ( 1 + rate)^5 - 1 / rate
put all value here
Future value = principal ( 1 + rate)^5 - 1 / rate
Future value = 3100 ( 1 + 0.085)^5 - 1 / 0.085
Future value = 18368.66
you have just after you make the 5th deposit is $18369