SOLUTION: 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 anothe

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Question 48989: 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 Nate(3500) About Me  (Show Source):
You can put this solution on YOUR website!
one initial virus infected one computer: y-int = 1
slope (20 computers per 5 minutes) = 20/5 = 4 per minute
y+=+4x+%2B+1
100000000+=+4x+%2B+1
99999999+=+4x
about 2.5 x 10^7 or about 25,000,000 minutes or about 5,000,000 intervals of five minutes