The half-life of a radioactive isotope is the time it takes for a quantity of the isotope to be reduced to half its initial mass. Starting with  120  grams of a radioactive isotope, how much will be left after  6  half-lives?

College Algebra (MindTap Course List)
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Chapter5: Exponential And Logarithmic Functions
Section5.CR: Chapter Review
Problem 15E: The half-life of a radioactive material is about 34.2 years. How much of the material is left after...
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The half-life of a radioactive isotope is the time it takes for a quantity of the isotope to be reduced to half its initial mass. Starting with 

120

 grams of a radioactive isotope, how much will be left after 

6

 half-lives?

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