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The radioactive substance Iridium-192 has a half-life of 73.83 days. How many days would it take for a sample of Iridium-192 to decay to 10% of its original amount? Round your answer to the nearest integer.

 Apr 4, 2020
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1/2 = e-k(73.83)

k=.009388422

 

.1   =  e-.009388422 t

 t= ~ 245 days

 Apr 4, 2020

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