An unknown sample contains radioactive element U-235. If the original amount present is 3500 atoms, how long would it take to decay to 125 atoms? The half-life of U-235 is 700Million years. 3,500 million years 3,365 million years 3,125 million years O 3, 750 million years

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Author:Ron Larson
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Chapter5: Exponential And Logarithmic Functions
Section: Chapter Questions
Problem 28T: The half-life of radioactive actinium ( 227AC ) is 21.77 years. What percent of a present amount of...
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An unknown sample contains radioactive element U-235. If the original amount present is 3500 atoms,
how long would it take to decay to 125 atoms? The half-life of U-235 is 700Million years.
3,500 million years
3,365 million years
3,125 million years
O 3, 750 million years
Transcribed Image Text:An unknown sample contains radioactive element U-235. If the original amount present is 3500 atoms, how long would it take to decay to 125 atoms? The half-life of U-235 is 700Million years. 3,500 million years 3,365 million years 3,125 million years O 3, 750 million years
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