jade143 jade143

15-03-2018
Mathematics

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Plutonium -25 has a half live of 6 hours . George has 5000 grams of plutonium -25 . How much plutonium-25 will hearse have after 4 days

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sqdancefan sqdancefan

15-03-2018

The amount (a) after d days will be
.. a(d) = 5000*(1/2)^(4d)

.. a(4) = 5000*(1/2)^(4*4) = 5000/2^16 ≈ 0.076 . . . grams

George will have about 0.076 grams after 4 days.

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