Sarah buys little stuffed animals for $5 each. They come in different varieties. If the producer stops making (retires) a certain variety, a stuffed animal of that variety will be worth $100; otherwise it is worth $0. There is 50% chance that any variety will be retired. What is the value to Sarah of knowing ahead of time whether a variety will be retired?

The feature of the above figure that indicates that the firm is a perfectly competitive firm is the

A) shape of the total cost curve. B) shape of the total revenue curve. C) fact that the total cost and total revenue curves are farthest apart at output is Q2. D) fact that the total cost and total revenue curves cross twice.

Which of the following is a reason people choose to hold more cash?

a) Interest rates paid on savings and checking accounts at the bank rise dramatically. b) Consumers have more faith in the stability and safety of the financial system. c) Interest rates paid on savings and checking accounts at the bank are near zero. d) Holding cash becomes less convenient.