You wash dishes for a chemistry laboratory to make extra money for laundry. You earn \(6\) dollars/hour, and each shift lasts \(75\) minutes. Your laundry requires \(6\) quarters/load.
A sprinter set a high school record in track and field, running \(200.0\) m in \(21.5\) s. What is the average speed of the sprinter in kilometers per hour?