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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.

Identify one way in which the changes during the industrial revolution can be considered a political turning point in world history

How many neutrons does an element have if its atomic number is 40 and its mass number is 156?