SOLUTION: In the year 2006 it was discovered that global population was increasing at the annual rate of 1.7%. In what year will the global population be double?

Question 107581: In the year 2006 it was discovered that global population was increasing at the annual rate of 1.7%. In what year will the global population be double?
Found 2 solutions by josmiceli, scott8148:
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
I get sometime late in 2064
I start with population = p in 2006
2006 p
2007 p + .017p
2008 p + .034p
2009 p + .051p
the question is, what year do I reach p + p = 2p?
How many .017 's until I get to 1?

This is late Sept of 2064
Answer by scott8148(6628) (Show Source): You can put this solution on YOUR website!
let x="year of doubling" ... 2=(1.017)^(x-2006) ... log2=(x-2006)(log1.017)

(log(2))/(log(1.017))=x-2006
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