A large grocery chain found that, on average, a checker can recall P% of a given price

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A large grocery chain found that, on average, a checker can recall P% of a given price list x hours after starting work, as given approximately by
P(x) = 96x - 24x2 0 ≤ x ≤ 3
At what time x does the checker recall a maximum percentage? What is the maximum?
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College Mathematics for Business Economics Life Sciences and Social Sciences

ISBN: 978-0321614001

12th edition

Authors: Raymond A. Barnett, Michael R. Ziegler, Karl E. Byleen

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