Question

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Which rate can you set StartFraction 30 miles Over 1 hour EndFraction equal to in order to find the time it takes to travel 900 miles at 30 miles per hour?

StartFraction question mark hours Over 900 miles EndFraction

StartFraction question mark hours Over 30 miles EndFraction

StartFraction 30 miles Over question mark hours EndFraction

StartFraction 900 miles Over question mark hours EndFraction

Answer 1

9514 1404 393

Answer:

  D. (900 mi)/(? hours)

Step-by-step explanation:

The given fraction has miles in the numerator and hours in the denominator. To write a proportion, you need to equate that to a fraction that has miles in the numerator and hours in the denominator. The (miles, hours) pair of interest is (900 miles, ? hours), so the necessary proportion is ...

  $\dfrac{30\text{ miles}}{1\text{ hour}}=\boxed{\dfrac{900\text{ miles}}{\text{? hours}}}$