Find dy/dx when y = cos x/sin^2 x

Which of the following is an example of negative reinforcement? a.marty knocks over his mother's prize fern so she gives him a time out. b.gwen mows the lawn and her dad takes her out for ice cream. c.tara takes an aspirin, and her headache begins to go away. d. peter comes in late from his lunch and is fired from his job.

An individual who is highly motivated to improve his or her economic and social standing would likely feel most frustrated in what kind of system? a. caste b bourgeoisie c.class d. patrilineal

An economy that is not using all of its resources would: be operating on the line closer to the vertical axis. be operating on the line closer to the horizontal axis. be operating inside the production possibilities curve. be operating outside the production possibilities curve. be suffering from high inflation.