A city had 400 migrants in the year 2000. Since then, The number of migrants in a countrythe city has doubled every 3 years. If there were 400 migrants in the country in the year 2000, What was the increase in the population of migrants during the period from 2009 to 2012?
Choices
A) 1400
B) 2300
C) 3000
D) 3200
E) 3800
The population will increase in the following order:   2000: 400   2003: 800   2006: 1600   2009: 3200   2012: 6400   3200ifference between 2009 and 2012 = 3200   Option 3200
<result>D</result>
A city had 400 migrants in the year 2000. Since then, The number of migrants in a countrythe city has doubled every 3 years. If there were 400 migrants in the country in the year 2000, What was the increase in the population of migrants during the period from 2009 to 2012?