Madeline deposits $5,800 every year into an account earning an annual interest rate of 5.2% compounded annually. How much would she have in the account after 15 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. Madeline deposits $5,800 every year into an account earning an annual interest rate of 5.2% compounded annually. How much would she have in the account after 15 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=$5,800 (the amount invested at the end of each period)i=5.2% or 0.052 (the interest rate per period)n=15 (the number of periods)We need to find A, the future value of the account after n periods.
Convert interest rate: Convert the percentage interest rate to a decimal. i=5.2%=1005.2=0.052
Plug values into formula: Plug the values into the compound interest formula.A=d×((1+i)n−1)/iA=$(5,800)×((1+0.052)15−1)/0.052
Calculate compound factor: Calculate the compound factor (1+i)n.(1+i)n=(1+0.052)15(1+i)n≈1.05215(1+i)n≈2.1133137 (rounded to 7 decimal places for precision)
Calculate numerator: Calculate the numerator of the formula: ((1+i)n−1). ((1+i)n−1)≈2.1133137−1((1+i)n−1)≈1.1133137
Divide by interest rate: Divide the result from Step 5 by the interest rate i. 0.0521.1133137≈21.4094952 (rounded to 7 decimal places for precision)
Multiply by amount: Multiply the result from Step 6 by the amount invested at the end of each period d.A≈$(5,800×21.4094952)A≈$124,174.8716
Round future value: Round the future value of the account to the nearest dollar. A≈$124,175