+109 A motorcycle is depreciating at 19% per year, every year. A student's $21,000 motorcycle depreciating at this rate can be modeled by the equation V(t) = 21,000(0.81)t. What is an equivalent equation for this vehicle as a monthly depreciation and, using this equation, what is the motorcycle worth (rounded to the nearest ten dollar) 4 years after purchase?
A.) V(T)=21,000(1.19)^-T, $10,470
B.) V(t)= 21,000(0.8100) ^12t, $ 19,580
C.) v(t)= 21,000 (0.9826)^12t, $9,040
D.) v(t)=21,000 (0.9826)^t, $9,040
