A biker traveled 20 miles in 4 hours. A unit rate to describe this would be 5 miles per hour. What is another unit rate in this situation? 1. 1/5 mile per hour
2. 1/5 hour per mile
3. 1 mile per hour
4. 5 hours per mile

20 miles) / (4 hours) = (20/4) (miles/hours)  =  5 miles per hour

(4 hours) / (20 miles) = (4/20) (hours/miles)  =  0.2 hours per mile =

                                                                            12 minutes per mile

ab will be equal to