Question 1109607
R=-2.5p^2+850 p
This is a quadratic where the vertex is the maximum value.
vertex p value is -b/2a=-850/-2.5*2=+170 so $170 is price at maximum revenue
R=-2.5*170^2+850*170
=-72250+144500
=$72,250
{{{graph(300,300,-60,200,-100000,100000,-2.5x^2+850x)}}}