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anonymous

  • one year ago

A medical ninja has a 15-gram sample to I-131 and would like to know its half-line, in days. He also knows that k= 0.0856. N = N0e^-kt N0 = 15 grams N = 7.5 grams K = 0.0856 t = ? Find the half-line, in days, of I-131 using the information given. Round your answer to the nearest tenth. (Lol I changed scientist to ninja b/c Naruto is awesome.) <3 Thanks your help!

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  1. ganeshie8
    • one year ago
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    Plugin the given values into the equation \[\large N = N_0e^{-kt}\]

  2. ganeshie8
    • one year ago
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    \[\large 7.5 = 15e^{-0.0856t}\]

  3. alekos
    • one year ago
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    do you know what to do next?

  4. anonymous
    • one year ago
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    is it 8.1?

  5. alekos
    • one year ago
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    how the devil did you get that?

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