For this problem, if the answer is in dollars, be sure to include the dollar sign - example: $325.12 instead of 325.12. If the answer is a rate, be sure to include the percent symbol - example: 5% instead of 0.05. When dealing with simple interest accounts, determine the missing piece: The annual simple interest rate for a loan of 95 days requiring $83.60 interest on principal of $730 is . The principal needed to earn $420 in interest on 7% monthly simple interest over 5 years is . The finance charge for the credit card based on the following information: ADB is $6,700 at 15.99% annual simple interest over July is