marginal profit function

haley2011

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Apr 4, 2010
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The profit from selling a certain oven is given by P(x)= -x^3-4x^2+80x
I found the actual profit from the sale of the 4th oven.
-4^3-4(4)^2+80(4)=$192

Then, it asks to use the marginal profit function to estimate the profit from the 4th oven and that is the part I don't know how to do. Please help.
 
haley2011 said:
The profit from selling a certain oven is given by P(x)= -x^3-4x^2+80x
I found the actual profit from the sale of the 4th oven.
-4^3-4(4)^2+80(4)=$192

Then, it asks to use the marginal profit function to estimate the profit from the 4th oven and that is the part I don't know how to do. Please help.

What is the definition of marginal profit function?
 
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