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25 February, 08:48

Situation:

a 48 gram sample of substance that's used for drug research has a k-value of 0.1325.

Find the substance's half-life, in days. Round your answer to the nearest tenth

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Answers (1)
  1. 25 February, 10:07
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    12 = e -.1325t

    ln (.5) = -.1325t

    t = ln (.5) / -.1325

    t=5.2

    i guess in general you can see that the answer will be ln (.5) / - k
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