Which of these expressions will give the unpaid balance after 6 years on a $90,000 loan with an APR of 7.2%, compounded monthly, if the monthly payment is $708.61? A. 90,000(1+0.072)^72+708.61[1-(1+0.072)^72/0.072]B. 90,000(1+0.006)^6+708.61[1-(1+0.006)^6/0.006]C. 90,000(1+0.006)^72+708.61[1-(1+0.006)^72/0.006]D. 90,000(1+0.072)^6+708.61[1-(1+0.072)^6/0.072]

Answer:   none of the expressions shown is correct   The appropriate expression is ...      90,000(1+0.006)^72+708.61[(1-(1+0.006)^72)/0.006] . . . best matches CStep-by-step explanation:The formula used to calculate the remaining balance is ...   A = P(1 +r)^n +p((1 -(1 +r)^n)/r) . . . . . note the parentheses on the fraction numeratorIn this formula, r is the monthly interest rate: 7.2%/12 = 0.006, and n is the number of monthly payments: 6×12 = 72. Putting these values into the formula along with the loan amount (P=90,000) and the payment amount (p=708.61) gives ...   A = 90,000(1.006)^72 +708.61((1 -(1.006)^72)/0.006)   A = 74,871.52