The amount of a radioactive isotope present in a certain sample at time t is given by A(t)=800e-0.02831t grams, where t years is the time since the initial amount was measured. How long will it take for the amount of the isotope to equal 508 grams?

The amount of a radioactive isotope present in a certain sample at time t is given by A(t)=800e-0.02831t grams, where t years is the time since the initial amount was measured. How long will it take for the amount of the isotope to equal 508 grams?

College Algebra

10th Edition

ISBN:9781337282291

Author:Ron Larson

Publisher:Ron Larson

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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The amount of a radioactive isotope present in a certain sample at time t is given by A(t)=800e^-0.02831tgrams, where t years is the time since the initial amount was measured. How long will it take for the amount of the isotope to equal 508 grams?

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