<PRE><B>Question 326229</B>
 The number of insects attracted to a bright light is currently 8. If the number is expected to quadruple every 10 minutes, how long will it take for the number to reach 500?
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A(t) = Ao(4)^(t/10) where t is in minutes.
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500 = 8*4^(t/10)
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4^(t/10) = 62.5
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Take the log and solve for &quot;t&quot;:
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(t/10)*log(4) = log62.5
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t/10 = 2.9829
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t = 29.98
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Round up to t = 30 minutes
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Cheers,
Stan H.</PRE>