document.write( "Question 1128878: Suppose that the world population is increasing at an annual rate of 1.2% if we assume an exponential growth model in how many years will the population double? \n" ); document.write( "

Algebra.Com's Answer #745393 by math_helper(2461) $\"\"$ $\"About$

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$\"+P+=+P%5Bo%5De%5E%28kt%29+\"$

\n" ); document.write( " $\"+2P%5Bo%5D+=+P%5Bo%5De%5E%280.012t%29+\"$

\n" ); document.write( "Cancelling the $\"P%5Bo%5D\"$ 's and taking log of both sides:
\n" ); document.write( " $\"+ln%282%29+=+0.012t+\"$

\n" ); document.write( " $\"+t+=+ln%282%29%2F0.012+=+0.693%2F0.012+=+highlight%28+57.8+%29+\"$ years \n" ); document.write( "

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