Algebra.Com's Answer #138598 by Edwin McCravy(20059)![\"\"](\"/images/stars/stars-13.gif\")  
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the number of bacteria in a culture increased sixfold in 10 hours. Assuming natural growth, how long did it take their number to double?
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document.write( "Your textbook and teacher may be using different letters from the\r\n" );
document.write( "ones I use, if so you can change the letters to yours.\r\n" );
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document.write( " has gone from  to  while t increased to  . \r\n" );
document.write( "So we substitute for and for  :\r\n" );
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document.write( "Divide both sides by \r\n" );
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document.write( "Change to natural log form:\r\n" );
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document.write( "So we take the original formula\r\n" );
document.write( "and substitute  \r\n" );
document.write( "for r.\r\n" );
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document.write( "Now we want to find what is when  \r\n" );
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document.write( "Divide both sides by \r\n" );
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document.write( "Change to natural log form:\r\n" );
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document.write( "Edwin \n" );
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