An investigator reviewed the medical records of 200 children seen for care at Boston Medical Center in the past year who were between ages of 8 and 12 years old and identified 40 with asthma. He also identified 40 children of the same age who were free of asthma. Each child and his or her family were interviewed to assess whether there might be an association between exposure to second-hand smoke and asthma. Classify this study as a

Think about the items and services that you and your family buy or consume. what causes you to pay the prices that you do for these goods and services? what determines the price that's on the price tag? what goes into determining, or setting, that price? consider all the possible elements that could influence the prices you pay.

Why are people more likely to marry individuals with social and cultural backgrounds very similar to their own? a. parents and other family members always exert pressure to marry within the group. b. people spend a great deal of time alone, and therefore can have few opportunities for meeting people. c. people develop irrational fears of out-group members and are scared to date them. d. people have greater access to individuals like themselves.

How did kenya gain its idpendence in 1963