A firm is producing 20 units with an average total cost of $25 and a marginal cost of $15. If it increases production to 21 units, which of the following must occur? a. Marginal cost will decrease. b. Marginal cost will increase c. Average total cost will decrease. d. Average total cost will increase.

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If an investment has 35 percent more nondiversifiable risk than the market portfolio, its beta will be:

After hearing a knock at your front door, you are surprised to see the prize patrol from a large, well-known magazine subscription company. it has arrived with the good news that you are the big winner, having won $21 million. you have three options.(a) receive $1.05 million per year for the next 20 years.(b) have $8.25 million today.(c) have $2.25 million today and receive $750,000 for each of the next 20 years.your financial adviser tells you that it is reasonable to expect to earn 13 percent on investments.