What is a bond buyer promised when she buys a bond?

In perfect competition, when market demand decreases, explain how the price of the good and the output and profit of each firm changes in the short run

What will be an ideal response?

Which of the following average cost functions suggests the presence of a natural monopoly?

A) AC = 2 B) AC = 100/Q + 2 C) TC = 100/Q + 2Q D) All of the above.