Final answer:
Amy's monthly car payment can be calculated using the amortization formula based on the principal amount after a 10% down payment, the monthly interest rate, and the loan term. She'll pay off the remaining balance of $31,500 over 60 months with an APR of 5.5%.
Step-by-step explanation:
Amy bought a new car for $35,000 and paid a 10% down payment. The financed amount would then be 90% of $35,000, which is $31,500. The loan is to be paid off over 60 months (5 years) with an annual percentage rate (APR) of 5.5%. To determine the monthly payment, we can use the formula for an amortizing loan:
The formula is M = P[i(1+i)^n] / [(1+i)^n - 1], where:
P = principal amount (amount of loan after down payment)
i = monthly interest rate (annual rate divided by 12)
n = total number of payments (loan term in months)
First, we calculate the monthly interest rate:
i = APR / 12 = 5.5% / 12 = 0.00458333 (approximately).
Now, we plug in the values into the formula:
M = 31500[0.00458333(1+0.00458333)^60] / [(1+0.00458333)^60 - 1].
Calculating this, we get the monthly payment M.
The exact monthly payment amount will require calculation using this formula or a financial calculator, which should provide the monthly payment to the nearest cent as required. Notably, the final monthly payment will incorporate both principal and interest.