Marcus du Sautoy presents a problem about his imagined commute to work. He can travel 10mph on the way there, and 15mph on the way back. The distance is fixed, so the question is, what is his average ...
15don MSN
Colorado's New Speed Cameras Can't Be Outsmarted by Waze or Radar Detectors for Good Reason
The cameras calculate your average speed, so apps and radar detectors won't help you avoid a fine—and that's the point.
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