What is the average speed of a vehicle at the given time

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Question: AVERAGE SPEED OF A VEHICLE The average speed of a vehicle on a stretch of Route 134 between 6 a.m. and 10 a.m. on a typical weekday is approximated by the function

f(t) = 20t - 40√(t) + 50         (0 ≤ t ≤ 4)

Where f(t) is measured in miles per hour and t is measured in hours, with t = 0 corresponding to 6 a.m. At what time of the morning commute is the traffic moving at the slowest rate? What is the average speed of a vehicle at that time?

Reference no: EM131563702

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