The scale factor of the model car is
= 0.04166.
Step-by-step explanation:
Step 1:
The real-life car is much larger than the model car. For every inch on the model car, it is 2 feet on the real-life car.
We must convert 2 feet into inches. 2 feet = 24 inches.
So 1 inch on the model car is equal to 24 inches on the real-life car.
Step 2:
To calculate the scale factor, we divide the measurement after scaling by the same measurement before scaling.
In this case, the model car is the measurement after scaling and the real-life car is the measurement before scaling
The scale factor 
So the scale factor is
= 0.04166.