Question

Michael drives 50 miles per hour. Stephen drives 49 miles per hour. They started at the same spot, and drove

in opposite directions. After some time, they were 999.9 miles apart. How much time has passed?

Answer 1

See below

Explanation:

When you see PER think fractions. Miles PER hour is

`(miles)/(hour)`

We are given miles and told to solve for time. Use your knowledge of fractions to get what you need

The reciprocal of mi/hr would get what we need

`miles * (hours)/(miles)`

Miles cancels out here. So that means you can do this

`(1hour)/(50miles) * 999.9 \: miles`

In your calculator. Same with the other rate.