Brody deposits $8,700 every year into an account earning an annual interest rate of 7.9% compounded annually. How much would he have in the account after 14 years, to the nearest dollar? Use the following formula to determine your answer.A=d(i(1+i)n−1)A= the future value of the account after n periodsd= the amount invested at the end of each periodi= the interest rate per periodn= the number of periodsAnswer:
Q. Brody deposits $8,700 every year into an account earning an annual interest rate of 7.9% compounded annually. How much would he have in the account after 14 years, to the nearest dollar? Use the following formula to determine your answer.A=d(i(1+i)n−1)A= the future value of the account after n periodsd= the amount invested at the end of each periodi= the interest rate per periodn= the number of periodsAnswer:
Identify variables: Identify the variables from the problem.We are given:d=$8,700 (the amount invested at the end of each period)i=7.9% or 0.079 (the interest rate per period)n=14 (the number of periods)We need to find A, the future value of the account after n periods.
Convert interest rate: Convert the percentage interest rate to a decimal. i=7.9%=1007.9=0.079
Substitute values: Substitute the values into the compound interest formula.A=d×((1+i)n−1)/iA=$(8,700)×((1+0.079)14−1)/0.079
Calculate compound factor: Calculate the compound factor (1+i)n.(1+i)n=(1+0.079)14(1+i)n≈2.85311670611 (using a calculator)
Calculate numerator: Calculate the numerator of the formula: ((1+i)n−1). ((1+i)n−1)≈2.85311670611−1 ((1+i)n−1)≈1.85311670611
Divide by interest rate: Divide the result from Step 5 by the interest rate i. 0.0791.85311670611≈23.4565418482
Multiply by amount: Multiply the result from Step 6 by the amount deposited annually d. A≈inlinelatex18,700×23.4565418482A≈inlinelatex1204,071.9120794
Round future value: Round the future value of the account to the nearest dollar. A≈$204,072