A loan was made for $1,520. A payment of $1,601.72 was made at a later date in satisfaction of the loan. If interest is 6.3% compounded monthly, when was the payment made? 2. A $5,400 loan at 9.3% compounded monthly had a single payment of $6,700 made in satisfaction of the debt. How long was that payment made after the original debt? 3. A loan of $3,000 accrued to $3,510 after 2.75 years. What was the quarterly compounded interest rate