When dealing with simple interest accounts, determine the missing piece: 1. The annual simple interest rate for a loan of 85 days requiring $96.90 interest on principal of $1095 is 2. The principal needed to earn $180 in interest on 6% monthly simple interest over 5 years is 3. The finance charge for the credit card based on the following information: ADB is $5,700 at 18.99% annual simple interest over July is