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Help with astronomy

Science
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My best estimate for the factors f life, f civ, and f now are given below:

f life = 10^-3. Considering one billion suitable planets with possible life it is a reasonable estimate

f civ = 10^-4  this is lower because civilization factor of possible life is low

f now = 10^-2 considering 10^10 suitable planets it is reasonable

So N civ = 10 x 10^9 x 10^-3 x 10^- 3 x 10^-2

     N civ = 10^10 x 10^-8

     N civ = 10^2 =100

Answer: best estimate 100 civilizations with which we could potentially communicate

Nov 30th, 2014

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Nov 30th, 2014
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Nov 30th, 2014
Dec 3rd, 2016
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