Malik is saving money and plans on making monthly contributions into an account earning a monthly interest rate of 0.65%. If Malik would like to end up with $8,000 after 18 months, how much does he need to contribute to the account every month, 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. Malik is saving money and plans on making monthly contributions into an account earning a monthly interest rate of 0.65%. If Malik would like to end up with $8,000 after 18 months, how much does he need to contribute to the account every month, 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.A (future value of the account) = $8,000i (interest rate per period) = 0.65% per month or 0.0065 in decimal formn (number of periods) = 18 monthsWe need to find d (the amount invested at the end of each period).
Convert Interest Rate: Convert the interest rate from a percentage to a decimal.0.65%=1000.65=0.0065
Plug Values into Formula: Plug the values into the formula to solve for d.A=d×(i(1+i)n−1)(\newline\)$8,000=d×(0.0065(1+0.0065)18−1)
Calculate (1+i)n: Calculate the value of (1+i)n.(1+0.0065)18=(1.0065)18
Evaluate Exponent: Evaluate the exponent.(1.0065)18≈1.1213 (rounded to four decimal places for simplicity)
Substitute Value: Substitute the value from Step 5 into the formula.$8,000=d×(0.00651.1213−1)
Calculate Numerator: Calculate the numerator of the fraction.1.1213−1=0.1213
Divide by Interest Rate: Divide the numerator by the interest rate.0.1213/0.0065≈18.6615
Solve for d: Solve for d by dividing the future value A by the result from Step 8.d=18.6615extextdollar8,000
Calculate Contribution: Calculate the monthly contribution. d≈$(428.88)
Round to Nearest Dollar: Round the monthly contribution to the nearest dollar. d≈$429 (to the nearest dollar)
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