Six years ago, Stanley invested $14,200.00. Today, he has $21,000.00. If Stanley earns the same annual rate implied from the past and current values of his invsetment, then in how many years from today does he expect to have exactly $28,700.00

4.79 years (plus or minus 0.05 years)

10.79 years (plus or minus 0.05 years)

4.22 years (plus or minus 0.05 years)

14.84 years (plus or minus 0.05 years)

None of the above is within .05 percentage points of the correct answer