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?
i got this?????
100000000 = 1*(20)^(t/5). Log both sides.
log (100000000) = (t/5)*log(20).
t = 5*log(100000000)/log(20)
t = 30.75 minutes.

Question

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?
i got this?????
100000000 = 1*(20)^(t/5). Log both sides.
 log (100000000) = (t/5)*log(20).
 t = 5*log(100000000)/log(20)
 t = 30.75 minutes.

anonymous · Answer

looks good to me

anonymous · Answer

if you use log base ten you know right away that 
$$log(100,000,000)=8$$ because it just counts the zeros

anonymous · Answer

so your answer is 
$$\frac{40}{\log(20)}$$ but of course you still need a calculator to compute

anonymous · Answer

thx