Jimmy has a diecast metal car that is a scale model of an actual race car. If the actual length of the car is 10 feet 6 inches and the model has a length of 7 inches, what is the scale factor of the model to the actual car?
10 feet 6 inches = 126 inches. Length of the car is 126 inches and the model length is 7 inches. 126 : 7 = 18 The scale factor of the model to the actual car is 1 : 18.