Economics 20th Edition by Campbell McConnell ,Stanley Brue ,Sean Flynn

تمرين 1

FIGURE 9.8 The average-total-cost curve: unlimited number of plant sizes. If the number of possible plant sizes is very large, the average-total-cost curve approximates a smooth curve. Economies of scale, folby diseconomies of scale, cause the curve to be U-shaped.
The unlabeled red curves in this figure illustrate the:
a. average-total-cost curves of various firms constituting the industry.
b. short-run average-total-cost curves of various firms constituting the industry.
c. short-run average-total-cost curves of various plant sizes available to a particular firm.
d. short-run marginal-cost curves of various plant sizes available to a particular firm.