Friday
July 25, 2014

Homework Help: Calculus

Posted by Mike on Thursday, June 13, 2013 at 8:14pm.

The demand function for the Luminar desk lamp is given by the following function where x is the quantity demanded in thousands and p is the unit price in dollars.
p = f(x) = -0.1x2 - 0.3x + 39
(a) Find f '(x).
f '(x) =


(b) What is the rate of change of the unit price when the quantity demanded is 3000 units (x = 3)?
$ per 1000 lamps

What is the unit price at that level of demand?
$

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