Answer:
7 years 2 months.
Explanation:
Use the time value of money techniques to find the period, the time in years it will take to reach $31,000.
PV = - $21,000
i = 0.75 %
P/yr = 12
Pmt = - $100
Fv = $31,000
N = ?
Using a Financial Calculator to enter the values as above, N is 86.06 months that is 7 years 2 months.