### Finding the Investment Alternative with Fastest Payback

See attachment. 3. Choose the investment alternative with the fastest payback. We could ask how long it would take for our $10,000 investment to grow to $20,000 if we invested in the bank at 8% per year. To answer this question we are solving the equation for the number of periods, n: $10,000 = $20,000/1.08n On the fi