For this case we have an equation of the form:
Where,
A: initial loan
b: interest rate
x: number of years
Substituting values we have that the function that models the problem is:
By the end of the third year we have:
Answer:
the amount due at the end of 3 years is:
6.37864 kilo ... hopefully thats helpful!
The answer to your question....
10 because 90/9=10
Hope this helps! :D