Cost and revenue function, calculate the intervals where the profit is increasing?

C(x) = 0.32x^2 - 0.00004x^3

R(x) = 0.848x^2 - 0.0002x^3

Im lost!!(Thinking)(Thinking)

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- Nov 18th 2012, 08:12 AMEmma22Calculate intervals - cost and revenue function
**Cost and revenue function, calculate the intervals where the profit is increasing?**

C(x) = 0.32x^2 - 0.00004x^3

R(x) = 0.848x^2 - 0.0002x^3

Im lost!!(Thinking)(Thinking) - Nov 18th 2012, 08:59 AMSpringFan25Re: Calculate intervals - cost and revenue function
the profit function is the difference between cost and revenue, so

simplify terms in brackets...

now can you use the methods you have been taught to find the values of x where P(x) is increasing?