The Speed of Traffic Flow on a Certain Highway Between

question 66

Essay

The speed of traffic flow on a certain highway between 6 A.M. and 10 A.M. on a typical weekday is approximated by the functon where is measured in miles per hour and t is measured in hours, with corresponding to 6 A.M. Find the interval where f is increasing, the interval where f is decreasing, and the relative extrema of f. Interpret your results.

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Definitions:

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