Summarize what it means to think at the margin.

If you heat soup on a stove, what happens to the movement of the soup’s particles? a. the particles move slower. b. the particles move faster. c. there’s no change in the speed of particles. d. the particles stop moving.

Which of the following is not among the root causes of poverty in the united states? size of family disabilities advanced degrees underemployment

How do most people in israel and its neighbors differ from political extremists such as terrorists