The Average Speed of a Vehicle on a Stretch of a Route

question 82

Multiple Choice

The average speed of a vehicle on a stretch of a route between 6 A.M. and 10 A.M. on a typical weekday is approximated by the function ​ , where is measured in miles per hour and is measured in hours, with 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?
​

• A) time = 7 A.M. ; average speed = 50 mph
• B) time = 7 A.M. ; average speed = 30 mph
• C) time = 7 A.M. ; average speed = 45 mph
• D) time = 7 A.M. ; average speed = 40 mph

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Definitions:

VNS

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CBT

Cognitive Behavioral Therapy, a psychotherapeutic approach that addresses dysfunctional emotions, behaviors, and cognitions through a goal-oriented, systemic process.

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Excessive production of cortisol by the adrenal gland, often associated with stress or disorders such as Cushing's syndrome.