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?