If a circular storage tank 12 ft in diameter and 15 feet high is ¾ full with water and water is then removed from the tank at a rate of 500 GPM, approximately how many minutes would it take before the tank is completely empty?

Which of the following physiologic effects is not produced by xanthines?

a. Cerebral vasodilation b. Cardiac muscle stimulation c. Bronchial smooth muscle relaxation d. Central nervous system (CNS) stimulation

In his research on boxers, French sociologist Loic Wacquant notes that being a professional boxer in the U.S. is a life choice that

A. leads many men into gang cultures. B. is heavily influenced by the oppressive realities of race and social class. C. indicates a rejection of both educational and occupational opportunities. D. is made early in life, usually before a boy is 10 years old.