justmeyasiah
justmeyasiah justmeyasiah
  • 11-05-2017
  • Mathematics
contestada

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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austinjohnson66 austinjohnson66
  • 11-05-2017
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 

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chasityalinewalker
chasityalinewalker chasityalinewalker
  • 12-05-2017

I think it may be a quarter of it left


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