Selma uses a jogging trail that runs through a park near her home. The trail is a loop that is 3/4 of a mile long. On Monday, Selma ran the loop in 1/6 of an hour. What is Selma's unit rate in miles per hour for Monday's run?

4.52 miles per hour.

This is a fraction equal to

0.75 miles : 0.166 hours

We want a unit rate where

1 is in the denominator,

so we divide top and bottom by 0.166

0.75 miles: 0.1660.166 hours: 0.166=4.52 miles1 hour=4.52 mileshour = 4.52 miles per hour