If something happens to alter the quantity supplied at any given price, then we move along the fixed supply curve to a new quantity supplied

Perfectly competitive firms and monopolist firms both maximize profit where

a. price equals marginal cost b. total revenue is maximized c. average total cost is minimized d. marginal cost equals marginal revenue e. price is as high as possible

Which of the following will not cause a change in demand for crackers?

a. a change in consumers' income b. a change in the price of crackers c. a change in the price of cheese d. a change in the number of cracker-eaters e. a change in consumers' tastes for crackers