Answer:
Interest = $1152.
Explanation:
Given information:
Loan = $1800
Rate of interest = 16%
It is given that the interest is not compounded, it means sare need to pay simple interest.
Formula for simple interest:

where, P is principal, r is rate of interest in % and t is time in years.
Substitute P=1800, r=16 and t=4 in the above formula.



Therefore, she will pay $1152 as interest.