Answer: The cost of loan for Mr. Moh = $6083.48,
Mr.Moh paid $2083.48 interest at the end of the 3 years.
Explanation:
Cost of a loan includes original amount and the interest charged on it.
Formula to calculate accumulated amount after t years:
, where P= original amount, r=rate of interest.
Here, P= $4000 , r= 15%= 0.15, t = 3 years
![A=4000(1+0.15)^3\\\\=4000(1.15)^3\\\\=4000*1.52087\approx6083.48](https://img.qammunity.org/2022/formulas/mathematics/high-school/7y6d16xghhtze413fhcbyx82zat3k8elig.png)
Cost of loan = $6083.48
The cost of loan for Mr. Moh = $6083.48,
Interest = A-P = $(6083.48-4000)= $ 2083.48
Hence, Mr.Moh paid $2083.48 interest at the end of the 3 years