Answer: Interest after 12years is $54
Explanation:
Simple interest (I) is calculated by Principal x Rate x Time
From the question given, Principal= $50; Rate = 9% = 9/100 = 0.09
Time= 12years
Slot the values into the formula
I =$50 x 0.09 x 12
I =$54
I hope this is clear, do have a great day!