What represents the value of the second-best alternative that a person gives up when making a choice?

A marginal spending

B. marginal benefit

с.

opportunity cost

D

marginal cost

What occurrence was considered the end of the roman empire and the beginning of the dark age?

Which is the name for the document that describes how a city government should operate? Municipal Charter Federal Constitution State Constitution Separation of powers

14. Which statement represents a difference between horizontal and vertical relationships? A. Both vertical and horizontal relationships represent unequal status. B. Both vertical and horizontal relationships represent equal status. C.

What are ways that human activity impacts the water supply? Creating sewage Spreading chemicals Increasing radioactivity All of the above

Which of the following appeals might be considered unprofessional? a. ethos b. logos c. pathos d. all e. none

People with panic disorder are more likely than other people to have which condition?

Nick is 27 years old and complains of ringing in ears, frequent dizziness, occasional heart palpitations and is tense and irritable most of the time. He says that sometimes he begins shaking and does not know why.

Which of the following bestdescribes how American westward expansion in the 19th and 20th centuries influenced the regional and ethnic identities of the United States? A.

What has 15 joints and 5 extruding bones?

Philosophers are most interested in what kind of questions?