# algebra

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the revenue from selling x units of a product is given by y=-0.0002x^2+60x. how many units must be sold in order to have the greatest revenue?
I think I need to use this formula: -b/2a, but I'm not sure if I'm getting the right answer. please explain step by step.
thank you.

• algebra -

-b/2a is when x gives the maximum y.

-60/(2*-.0002)= you do it.

• thank you -

thanks again!

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