In one investigation, researchers followed three adolescent cohorts, each born a year apart, over three years to see if family harmony changed as the participants experienced dramatic physical and psychological changes. After ruling out , the researchers concluded from this design that family closeness declines steadily from sixth to tenth grade.

Why does the author attempt to convince the reader that what he has described of the middle colonies is factual?

Which scenario is least likely to occur in a market economy? a) the government pays farmers to stop planting certain crops for a period of time. b) the government stops a factory from producing imitations of an expensive type of purse. c) the government offers tax breaks to companies that meet efficiency goals in their products. d) the government allows only two competitors to offer goods for sale on the country's highways.

Idon’t understand 8. plz ! we are finding the area of polygons. thx in advance!