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Answer:BStep-by-step explanation:To answer this, we need to see the to see to the fact that they are both in the same unit before we can take the ratio.Firstly, we know that 1 foot = 12 inches. 9 feet would this be 9 * 12 = 108 inches.Now we are told to get the ratio of length of car to length of model.This means 108:6 = 18:1...