Rita is a postal clerk. She comes to work at 6 A.M. and t hours later has

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Rita is a postal clerk. She comes to work at 6 A.M. and t hours later has sorted approximately f (t) = −t3 + 7t2 + 200t letters. At what time during the period from 6 A.M. to 10 A.M. is Rita performing at peak efficiency?

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Calculus For Business, Economics And The Social And Life Sciences

ISBN: 9780073532387

11th Brief Edition

Authors: Laurence Hoffmann, Gerald Bradley, David Sobecki, Michael Price

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