Science

An element has a half-life of 29 hours. If 100 mg of the element decays over a period of 58 hours, how many mg of the element will remain?
So far I have;
n= elapsed time/ half-life
=58/29
n=2

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  1. so
    if 100 at t = 0
    then 50 at t = 29
    then 25 at t = 58

    or 100* (1/2)^2 = 100 * 1/4 = 25

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    Damon
  2. Thank you

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  3. You are welcome.

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    Damon

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