Answer: $2875
Explanation:
The formula to calculate the simple interest is given by :-
, where P is the principal amount , r is the rate of interest and t is the time period.
Given: Principal amount = $2500
Rate of interest = 15%=0.15
Time period = 1 year
Now, the simple interest gained by Darrel after 1 year will be :-

Now, the total amount his friend owed altogether=
