A new car will depreciate in value after it is purchased. Consider a new truck worth $42,000. If the truck depreciates in value by $8400 each year, then write a formula
that gives the value of the truck after n years.
An=42,000-(0.80)
An=42,000-8,400-n
A,=42,000+8,400-n
An=42,000-(1.20)
Which one is it? First, second, third or last?