Final answer:
The instantaneous velocity of the car at t = 2 hours is 4 km/hr.
Step-by-step explanation:
To find the instantaneous velocity of the car at t = 2 hours, we need to differentiate the position function f(t) = t^3 - 2t^2 + 4 with respect to time. Taking the derivative, we get f'(t) = 3t^2 - 4t. Plugging in t = 2 into the derivative, we get f'(2) = 3(2)^2 - 4(2) = 12 - 8 = 4 km/hr.