An airplane on autopilot took 9 hours to travel 6 comma 219 kilometers. What is the unit rate for kilometers per hour?
To find the unit rate for kilometers per hour, we need to divide the total distance traveled by the total time taken.
Total distance traveled: 6,219 kilometers
Total time taken: 9 hours
Unit rate = Total distance traveled / Total time taken
= 6,219 kilometers / 9 hours
= 691 kilometers per hour
Therefore, the unit rate for kilometers per hour is 691 kilometers/hour.