Answer:
something smaller than 1/483.33, possibly 1/500
Step-by-step explanation:
For the model to fit into the car, the scale must be less than ...
(3 ft)/(1450 ft) = 1/483.33
It might be convenient for Jeff to use a scale factor of 1 : 500. This would result in a model ...
(1450 ft)/500 · (12 in/ft) = 34.8 in
leaving about 1.2 inches of clearance in his mother's car.