Each day the total output of a coal mine after t hours of operation is approximately 40t

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Each day the total output of a coal mine after t hours of operation is approximately 40t + t2 - 1/15t3 tons, 0 ≤ t ≤ 12. What is the rate of output (in tons of coal per hour) at t = 5 hours?

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Calculus And Its Applications

ISBN: 9780134437774

14th Edition

Authors: Larry Goldstein, David Lay, David Schneider, Nakhle Asmar

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