I found the missing part of this question.
Statisics on Human Population
<span><span>Year A.D. Number of People (in billions)
</span><span>1650 .50
</span><span>1750 .70
</span><span>1850 1.0
</span><span>1925 2.0
</span><span>1956 2.5
</span><span>1966 3.3
</span><span>1970 3.6
</span><span>1974 3.9
</span><span>1976 4.0
</span><span>1980 4.4
</span><span>1991 5.5
</span><span>2000 6.0
</span><span>2004 <span>6.4
</span></span></span>
The answer is it took 200 years more to double the population from 0.50 billion to 1.0 billion people. The year was 1850.
It was in 1925 when the population double again from 1.0 billion to 2.0 billion.
True the asnwer is trueeeeeee
