Question 8 a Ethical principles developed by the American Psychological Association help ensure that human participants in psychological research
A
get paid for their time and trouble
B
have not participated in similar research in the past
с
are protected from physical and psychological harm
D
understand the hypotheses of the researcher before they take part
keep the purposes of the research project confidential

Analyze and evaluate the motivation and the rationale behind western expansion through the louisiana purchase that took hold in the united states at the start of the 19th century (long essay question)

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

A. describe the model of urban structure most often observed in mega-cities in developing countries. explain how this model differs from common urban structures in north america. b. describe at least two factors leading to the growth of mega-cities in developing or least-developed countries. c. identify and explain two factors that led to the formation of squatter settlements in mega-cities in developing countries.