Researchers have been able to teach a rat that it has to push the lever five times to get food. every time the lever is pushed five times the rat will get a piece of food, but if it is pushed less than five times it will not get the food. this type of reinforcement scheduled is called what?

Africa, 1914 which statement is the best conclusion for the information presented in the map? a) european colonization had a positive impact on african nations. b) african colonization the economic growth of all european nations involved. c) by the outbreak of world war i, most of the african continent was under english control. d) by the outbreak of world war i, most of the african continent was under european control.