Robert's unit rate in miles per hour (mph) is 5.2 miles per hour.
What is speed?
Speed is the change in displacement resulting from the interaction of distance with time.
Speed measures the ratio of distance to time.
Data and Calculations:
Distance covered in 3 miles = 34.5 minutes
Distance to be covered in one hour = 5.217 miles (3/34.5 x 60)
Robert's speed = 5.2 miles per hour.
Thus, Robert's unit rate in miles per hour (mph) is 5.2 miles per hour.
Learn more about distance, time, and speed at https://brainly.com/question/4931057
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