You walk up to a soda machine and put in a dollar, and are rewarded with a bottle of root beer. When you put in another dollar, you get another soda. Assuming that the machine does not run out of root beer, which kind of reinforcement schedule does this machine operate on

How does sociology account for the cause of drug and alcohol addiction?

The persian wars started when emperor darius i began an invasion of greece. what caused darius to decide to attack greece? a. greek pirates had raided persia's merchant ships and coastal towns. b. greek armies had attacked and taken over land that belonged to persia. c. greek city-states had supported rebellions in the persian empire. d. greek leaders had declared independence from the persian empire.

William golding was greatly influenced by his environmental circumstances. cite some of those influences as mentioned in the article.