Homework Help: Math Calculus

Posted by Trisha on Monday, December 17, 2012 at 10:41pm.

The number of portable CD players you are prepared to supply to a retail outlet every week is given by the formula:
q = 0.1p2 + 2p
where p is the price it offers you. The retail outlet is currently offering you $50 per CD player. If the price it offers decreases at a rate of $1 per week, how will this affect the number you supply?

Math Calculus - Steve, Monday, December 17, 2012 at 11:33pm
q = 0.1p^2 + 2p
dq/dt = (0.2p + 2) dp/dt
at p=50,
dq/dp = (10+2)(-1) = -12

so the number supplied is decreasing by 12 per week.

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