If the cost function is C(x)=87x+630, determine how much revenue must be generated to reach the break-even point. Determine the coordinates of that point. Determine the vertex of the graph of the profit function P(x)=R(x)-C(x), and interpret each coordinate of the vertex.

4. The price-demand function for the new Hanford hand-held game unit is given by p(x) = 140 - x, where 0