Beautiful Bouquets Florist Company needs to buy a new delivery van and wants to determine the value of the van after a certain number of years. Which function below represents the value the new delivery van after x years if the van initially costs $30,000 and depreciates 15% per year?
A) y = 30,000(0.85)^x
B) y = 30,000(1.15)^x
C) y = - 15(30,000)^x
D) y = 30,000(0.15)^x