The figure above shows Clara's demand for CDs. At a price of $5 for a CD, the value of Clara's total consumer surplus for all the CDs she buys is

New airplanes, which normally consume less fuel per passenger-mile, become less efficient for commercial airlines to purchase and use as

A) average flight distances lengthen. B) fewer non-stop flights are scheduled. C) fuel prices fall. D) the demand for airline travel increases. E) the price of new airplanes falls.

What does a production possibilities frontier show?

a) scarce and less scarce resources b) global trade-offs and costs of doing business c) an economy that is producing but not at the maximum d) the maximum amount that an economy can produce