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5 billion * ( 1 + 0.013 ) ^x = 10 billion
1.013 ^x = 10 : 5 = 2
x = 54
1986 + 54 = 2040
In the year 2040 the world`s population will be 10 billion.
1.013 ^x = 10 : 5 = 2
x = 54
1986 + 54 = 2040
In the year 2040 the world`s population will be 10 billion.