Attached you will see the answer (use polynomial division)
In my opinion the ages for drinking/smoking should not be raised to 21. While I am not a fan of either and they almost never lead to good things, it just seems odd to me that a person can fight for his country at 18, but can't smoke or drink.
Answer:
$72
Step-by-step explanation:
Interest= PNR
p = principal
n = number of years
r = rate of interest
i = 6% x 800 x 18/12
i = 72