# Science:Math Exam Resources/Courses/MATH104/December 2012/Question 04 (c)

MATH104 December 2012
Other MATH104 Exams

### Question 04 (c)

The demand equation for a certain product is

${\displaystyle \displaystyle {}q^{2}+p^{3/2}+2p=20}$

where q is the number of units per hour the manufacturer can sell at a price of p dollars per unit.

At what rate (in dollars per hour) must the price above (\$4) be changed at this instant so that the revenue changes at 0.15 dollars per hour?

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