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

Which statement reflects a citizens need to increase his civic particpation

The southern colonies practiced indentured servitude and slavery because cash crops such as tobacco and sugar required many workers. the fishing and shipping industries required many workers. imprisoned debtors were brought from africa to settle the colonies. indentured servitude and slavery were not allowed in the caribbean colonies.

How did the growth of railroads american businesses expand