The simple interest earned is $ 72
Solution:
The formula for simple interest is given as:
I = PRT
Where,
I is the simple interest
P is the principal
R is the rate of interest
T is the number of years
From given,
P = 200
R = 9 % = 0.09
T = 4 years
Substituting the values we get,
[tex]I = 200 \times 0.09 \times 4\\\\I = 200 \times 0.36\\\\I = 72[/tex]
Thus simple interest earned is $ 72