Question

A downhill skier is traveling at a rate of 0.5 mile per minute. How far will the skier travel in 18 minutes?

Answer 1

See explanation

Explanation:

Since 0.5 miles can be traveled in 1 minute, that amount would be increased eighteen times if the skier skied for 18 minutes (think: 1 mile/minute, 60 miles/hour or 60 minutes).

Set up a proportion with `x` as the unknown distance for 18 minutes

`0.5/1=x/18 rarr` You can multiply 0.5 by 18 (just like the first denominator has been to get 18) or you can cross multiply.

`0.5*18=9`

Cross-multiplying:

`x*1=0.5*18`

`x=9`

9 miles per 18 minutes