Rajesh walks 2 km to south, then turns northeast, and walks 3 km. Then he turns south and walks 2 kms. Then he turns west and walks 4 kms. Finally, he turns northwest and walks 5 kms. In which direction is he from his starting point?
If the ___________ firm has zero costs or only has fixed cost, the quantity supplied in equilibrium is given by the point where the marginal revenue is zero.