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| Question 65200:  Any help on this would be great...
 A computer is infected with the Sasser virus.  Assume that it infects 20 other computers within 5 minutes; and that these PCs and servers each infect 20 more machines within another five minutes, etc.  How long until 100 million computers are infected?
 Answer by stanbon(75887)
      (Show Source): 
You can put this solution on YOUR website! A computer is infected with the Sasser virus.  Assume that it infects 20 other computers within 5 minutes; and that these PCs and servers each infect 20 more machines within another five minutes, etc.  How long until 100 million computers are infected? -----------------------
 After 5 minutes: 20
 After 10 minutes: 20^20
 20<100,000,000<20^20
 So it takes between 5 and 10 minutes to reach 100,000,000
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 20^x=100,000,000
 xlog20 = 8
 x=8/(log20)
 x=6.48974...
 So 20^6.48974... is enough to produce 100,000,000 infected computers.
 Cheers,
 Stan H.
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