Concept explainers
Reaction time. While driving a car, you see a child suddenly crossing the street. Your brain registers the emergency and sends a signal to your foot to hit the brake. The car travels a reaction distance D, in feet, during this time, where D is a function of the speed r, in miles per hour that the car is traveling when you see the child. That reaction distance is a linear function given by
a. Find
b. Graph
c. What is the domain of the function? Explain.
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CALCULUS+ITS APPLICATIONS
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