document.write( "Question 331596: Can someone please help me work through this?\r
\n" ); document.write( "\n" ); document.write( "The number of insects attracted to a bright light is currently 5. If the number is expected to quadruple every 9 minutes, how long will it take for the number to reach 700?\r
\n" ); document.write( "\n" ); document.write( "____ minutes
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Algebra.Com's Answer #237682 by galactus(183)\"\" \"About 
You can put this solution on YOUR website!
Initially, there are 5 bugs. If it quadruples in the first 9 minutes, there are 20 bugs.\r
\n" ); document.write( "\n" ); document.write( "\"20=5%2Ae%5E%28k%2A9%29\"\r
\n" ); document.write( "\n" ); document.write( "\"k=%282%2Aln%282%29%29%2F9\"\r
\n" ); document.write( "\n" ); document.write( "So, we have:\r
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\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\"5%2Ae%5E%28%282%2Aln%282%29%2At%29%2F9%29=5%2A2%5E%282t%2F9%29\"\r
\n" ); document.write( "\n" ); document.write( "\"700=5%2A2%5E%282t%2F9%29\"\r
\n" ); document.write( "\n" ); document.write( "\"140=2%5E%282t%2F9%29\"\r
\n" ); document.write( "\n" ); document.write( "\"t=32.08\" minutes
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