Suppose a firm operating in a perfectly competitive industry has costs in the short run given by: SRTC = 9 + q + q^2 and therefore MC = 1+ 2q.

If the minimum point of the short run ATC curve for all firms (existing and potential) is also the minimum point of the long run average cost curve (LRAC), what is the long-run equilibrium price, and firm quantity. What is the long-run equilibrium number of firms in the industry if the long-run demand curve is given by p = 700 - 7q?