Which best diagrams the correct obstacle to the example?

What is the relationship between marginal external cost, marginal social cost, and marginal private cost? a. marginal social cost equals marginal private cost plus marginal external cost. b. marginal private cost plus marginal social cost equals marginal external cost. c. marginal social cost plus marginal external cost equals marginal private cost. d. marginal external cost equals marginal private cost minus marginal social cost. marginal external cost a. is expressed in dollars, so it is not an opportunity cost b. is an opportunity cost borne by someone other than the producer c. is equal to two times the marginal private cost d. is a convenient economics concept that is not real

Stock a has a beta of 1.2 and a standard deviation of 20%. stock b has a beta of 0.8 and a standard deviation of 25%. portfolio p has $200,000 consisting of $100,000 invested in stock a and $100,000 in stock b. which of the following statements is correct? (assume that the stocks are in equilibrium.) (a) stock b has a higher required rate of return than stock a. (b) portfolio p has a standard deviation of 22.5%. (c) portfolio p has a beta equal to 1.0. (d) more information is needed to determine the portfolio's beta. (e) stock a's returns are less highly correlated with the returns on most other stocks than are b's returns.

Which of the following is true concerning the 5/5 lapse rule? a) the 5/5 lapse rule deems that a taxable gift has been made where a power to withdraw in excess of $5,000 or five percent of the trust assets is lapsed by the powerholder. b) the 5/5 lapse rule only comes into play with a single beneficiary trust. c) amounts that lapse under the 5/5 lapse rule qualify for the annual exclusion. d) gifts over the 5/5 lapse rule do not have to be disclosed on a gift tax return.