Concept explainers
Speeding Fines Speeding fines are determined by
where f(x) is the cost, in dollars, of the fine if a person is caught driving x miles per hour.
(a) Radar clocked a driver at 76 mph. How much was the fine?
(b) While balancing his checkbook, Johnny ran across a canceled check that his wife Gwen had written to the Department of Motor Vehicles for a speeding fine. The check was written for $100. How fast was Gwen driving?
(c) At what whole number speed are tickets first given?
(d) For what speeds is the fine greater than $200?
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Mathematical Ideas (13th Edition) - Standalone book
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