Answer
$\$ 38$
Work Step by Step
The sale is equal to $=-p+156$ and The revenue is equal to $=-p^2+156p$
For maximum revenue, we must have $\dfrac{dR}{dp}=0$
or, $-2p+156=0 \\ p=\$ 78$ per piece
Thus, the profit becomes: $\$ 78-\$ 40=\$ 38$
Finite Math and Applied Calculus (6th Edition)
by Waner, Stefan; Costenoble, Steven
Published by
Brooks Cole
ISBN 10:
1133607705
ISBN 13:
978-1-13360-770-0
Chapter 12 - Section 12.2 - Applications of Maxima and Minima - Exercises - Page 888: 33
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