document.write( "Question 388014: A biologist finds that the population of a certain type of bacteria doubles each half-hour. An initial culture has 90 bacteria.
\n" ); document.write( "How long will it take for the number of bacteria to reach 368,640? \n" ); document.write( "

Algebra.Com's Answer #274341 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"368640=90%2A2%5E%28kt%29\"$
\n" ); document.write( "where
\n" ); document.write( " $\"180=90%2A2%5E%28k%2830%29%29\"$
\n" ); document.write( " $\"2=2%5E%2830k%29\"$
\n" ); document.write( " $\"30k=1\"$
\n" ); document.write( " $\"k=1%2F30\"$
\n" ); document.write( "So then,
\n" ); document.write( " $\"2%5E%28t%2F30%29=4096\"$
\n" ); document.write( " $\"2%5E%28t%2F30%29=2%5E12\"$
\n" ); document.write( " $\"t%2F30=12\"$
\n" ); document.write( " $\"highlight%28t=360%29\"$ minutes \n" ); document.write( "

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