Hello,
To convert 45,000 inches to miles, we want to convert from inches to feet first.
Since there are 12 inches in a foot, and we are given inches, the number of feet that we calculate should be less than, not greater than, 45,000 inches.
Multiplying (45000) by (12/1) would only make the number larger, not smaller. We want to divide by 12, as the number of inches divided by 12 is equal to the number of feet. So, the first ratio is 1 foot/12 inches, which would mean dividing by 12. So, we know the answer is A or B.
Now, we have 45000/12 = 3750 feet. Now, we can use similar reasoning to choose the second ratio. There are 5280 feet in a mile, so the number of miles we will be calculating must be smaller than the 3750 feet we calculated earlier. Multiplying by (5280 feet/ 1 mile) will only make the number larger, and the number of miles must be smaller. Dividing the number of feet by 5280 will give the number of miles. So, we know the correct ratio is (1 mile/5280 feet).
So, the answer is B.
Hope this helps!
