algebra
posted by emma g .
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.

b/2a is when x gives the maximum y.
60/(2*.0002)= you do it. 
thanks again!