Answer:
Here we need to find the length of an annuity. We know the interest rate, the PV, and the payments. Using the PVA equation:
PVA =C({1 – [1/(1 +r)t]} /r)
$14,500 = $500{[1 – (1/1.0155)t] / 0.0155}
Now we solve for t:
1/1.0155t = 1 − {[($14,500)/($500)](0.0155)}
1/1.0155t= 0.5505
1.0155t= 1/(0.5505) = 1.817
t = ln 1.817 / ln 1.0155 = 38.83 months
Account will be paid off in 38.83 months.