What are the four most important ways a firm becomes a monopoly? the four main reasons a firm becomes a monopoly are:

a. the government blocks entry, control of a key resource, network externalities, and economies of scale.
b. antitrust legislation, control of a key resource, no close substitutes, and economies of scale.
c. the government blocks entry, control of a key resource, network externalities, and diseconomies of scale.
d. antitrust legislation, control of a key resource, arbitrage, and economies of scale.
e. the lack of patents and copyrights, control of a key resource, network externalities, and economies of scale.

Intronix uses copy editors, computer graphics specialists, and java programmers to produce ads for magazines and the internet. the average new ad for magazines typically requires 180 hours of a copy editor's time and 135 hours of a computer graphics specialist's time, whereas ads produced for the internet require 35 hours of copy editor time, 195 hours of computer graphics time, and 60 hours of a java programmer's time. lassie food, a dog food manufacturer, has hired intronix to produce ads in the next four week. although currently it considers magazine ads 3 times more valuable than internet ads, it still wishes to have at least 2 of each produced within the next four weeks. intronix has assigned up to 3 copy editors, 4 computer graphics specialists, and 1 java programmer, each committed to work up to 70 hours per week on the project. how many of each type of ad should be produced to maximize the overall value to lassie foods

You decide to invest in a portfolio consisting of 25 percent stock a, 25 percent stock b, and the remainder in stock c. based on the following information, what is the expected return of your portfolio? state of economy probability of state return if state occurs of economy stock a stock b stock c recession .16 - 16.4 % - 2.7 % - 21.6 % normal .55 12.6 % 7.3 % 15.9 % boom .29 26.2 % 14.6 % 30.5 %

Based on what you learned about time management which of these statements are true