A university professor wants to teach his theater server course by email. However, university officials frown on his plans, saying that the students need to be taught by a “live” instructor giving “live” instruction. What might be the harm of teaching by email? What part of the communication process is lost when teaching is totally technological?

In a perfectly competitive market, the long-run market supply curve tends to be horizontal or nearly so. what is another way to state this fact? (a) market supply is much more elastic in the long run than the short run. (b) in the long run, average total cost is minimized. (c) in the long run, price equals marginal cost. (d) market supply is much less elastic in the long run than the short run.