Question 581630
# 1

The total interest added on is 42400*0.024*5 = 5088 dollars


So the total amount to pay back is 42400 + 5088 = 47488


Divide this among 60 months (note: 5 yrs = 12*5 = 60 months) to get


47488/60 = 791.47


So the monthly payment is 791.47 dollars.

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# 2

A = P(1 + r/n)^(nt)


A = 3940(1 + 0.095/12)^(12*10)


A = 10149.66


So your answer was very close, you just forgot the 66 cents.