Bob finds it easier to concentrate on his studies when he finds the topic interesting. he is engrossed to such an extent that he does not even realize that the television has been turned to the maximum volume. however, if the topic does not interest him, he tends to get distracted at the drop of a hat. which of the following theories explains bob's behavior?

Based on this map, what can be concluded about the inca empire? (4 points) it was in a highlands region. it was in a mountainous region. it was in the amazon basin. it was in north america.

Why are the majority of the world's economies mixed? what may happen to the "pure" types of economies (traditional, socialist/command, market capitalist) when they incorporate elements from other economic models?

Martha participates in a research study in order to receive extra credit for her psychology class. when she arrives in the research office she is given a can of what looks and tastes like beer, but which actually contains no alcohol. in the adjoining room martha's classmate karen is also participating in the study. karen receives a can of alcoholic beer. if the experiment was designed to test the effects of alcohol on concentration, then who is exposed to the independent variable?