The current value of a new car is $24,000. The car will depreciate 12% per year over the next 5 years. Which exponential equation models this situation?

A. f(x)=24,000 * 0.12^x
B. f(x)=24,000 * 0.88^x
C. f(x)= 24,000 * 5^x
D. f(x)= 24,000 * 1.12^x