In the year 2002 the world population estimated at 6 billion people. Based on research from the World Bank, about 20% lives ln l
ess than $1 per day. How many people lived on less than $1 per day??????
1 answer:
6 billion= 6*10^9.
We have an equation: ?/ (6*10^9)= 20/100
Cross multiply:
100*?= 20* 6*10^9
⇒ ?= 20* 6*10^9/100= 1.2*10^9
About 1.2*10^9 people live on less than $1 per day~
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