Based on the information given, indicate whether the following industry is best characterized by the model of perfect competition, monopoly, monopolistic competition, or oligopoly.

a. industry a has a four-firm concentration ratio of 0.005 percent and a herfindahl-hirschman index of 75. a representative firm has a lerner index of 0.45 and a rothschild index of 0.34.
b. industry b has a four-firm concentration ratio of 0.0001 percent and herfindahl-hirschman index of 55. a representative firm has a lerner index of 0.0034 and rothschild index of 0.00023.
c. industry c has a four-firm concentration ratio of 100 percent and herfindahl-hirschman index of 10,000. a representative firm has a lerner index of 0.4 and rothschild of 1.0.
d. industry d has a four-firm concentration ratio of 100 percent and herfindahl-hirschman index of 5,573. a representative firm has a lerner index equal to 0.43 and rothschild index of 0.76

Using the exxon data as an example what would be the market capitalization of penny's pickles if each share is selling for $175.35?

Alandowner and his neighbor purchased adjoining undeveloped lots. after both built homes on their respective lots, the landowner suggested to the neighbor that a common driveway be built where the two lots joined. the neighbor agreed. the landowner and the neighbor split the cost of constructing the driveway and entered into a written agreement to equally share the costs of its upkeep and maintenance. the agreement was recorded in the county recorder's office. two years later, the neighbor built a new driveway located entirely on his lot. the common driveway, which the landowner continued to use but which the neighbor no longer used, began to deteriorate. the landowner asked the neighbor for money to maintain the common driveway, but the neighbor refused to contribute. three years later, the neighbor conveyed his lot to a friend. the friend entered into possession and used only the driveway built by the neighbor. by this time, the common driveway had deteriorated badly and contained numerous potholes. the landowner asked the friend to pay half of what it would take to repair the common driveway. the friend refused. the landowner repaired the driveway and sued the friend for 50% of the cost of repairs. will the landowner prevail?

Darlene has a balance of 3980 on a credit card with an apr of 22.8% paying off her balance and which of these lengths of time will result in her paying the least amount of interest?