Consider the perfectly competitive market for burritos. In the short run, a burrito company has a cost curve of STC(Q)=Q^2+4Q+9, the $9 fixed cost is non-sunk.
(a) What is the short-run supply curve for an individual burrito company?
(b) Suppose there are 40 burrito companies in the short-run. What is the market supply curve?
(c) Suppose the market demand curve is Q^D=420−5P. What is the short-run equilibrium price?