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22 January, 03:30

A spill of two gallons of methane occurs in the men's room. Methane has a half life of seven years. How much remains in 20 years

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Answers (2)
  1. 22 January, 05:08
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    I think the answer is None because half life of seven years means it's full life is 14 years and after 20 years there would not be any left
  2. 22 January, 06:33
    0
    I think it may be a quarter of it left
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