Amodel of a 42 ft. tall shopping mall was built using the scale l in: 3 ft. what is the height of the model?

To solve this question, all you need to do is multiply 42 times 1/3. Assuming that that is a fraction of course. So what is 42 * 1/3? But you can't multiply whole numbers times fractions, though. So what you need to make 42 into an improper fraction, which is 42/1. Then multiply 42/1 by 1/3. That comes out to be 42/3. So then you need to divide 42 by three, and you should get 14. So the answer is fourteen. But the question is asking the height which is technically 42 ft. But I would go with fourteen. I hope that long explanation helped you.