The value of car after three years is equal to the original price times the multiplier raised to a 3 (because of number of years). This is shown in the equation below,
V = P x (1 - r)^3
Substituting the given values,
V = ($15,000) x (1 - 0.2)^3
The value of the car after three years is equal to $7,680. The answer is letter D.