Carl placed $900 in a brokerage account that has been increasing its value by 16% per year. At the same time, Brad began placing 900 under a mattress at the beginning of each year who had more money after 22 years

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.