Gloria deposited $500 into a bank account that earned 7.5% simple interest each year. She earned $225 in interest before closing
the account. If no money was deposited into or withdrawn from the account, for how many years was the money in the account? Round your answer to the nearest whole year. Enter your answer in the box.
Equation: t = (1/r)(A/P - 1) Calculation: First, converting R percent to r a decimal r = R/100 = 7.5%/100 = 0.075 per year, then, solving our equation
t = (1/0.075)((725/500) - 1) = 6 t = 6 years
The time required to get a total amount, principal plus interest, of $ 725.00 from simple interest on a principal of $ 500.00 at an interest rate of 7.5% per year is 6 years.
Explanation: The numbers are increasing by 5 each term. To double check 13 - 8 equals 5. To make sure it's right add 13 + 5 equals 18 and so you can add 23 plus 5 equals 28. Which means that five is our pattern.
