The radioactive isotope of lead, Pb-209, decays at a rate proportional to the amount present at time t and has a half-life of 3.3 gram of this isotope is present initially, how long will it take for 29% of the lead to decay?

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Chapter5: Exponential And Logarithmic Functions
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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 radioactive isotope of lead, Pb-209, decays at a rate proportional to the amount present at time t and has a half-life of 3.3 hours. If 1
gram of this isotope is present initially, how long will it take for 29% of the lead to decay?
Type your answer in hours in the space provided below. Round your answer to two decimal places.
Transcribed Image Text:The radioactive isotope of lead, Pb-209, decays at a rate proportional to the amount present at time t and has a half-life of 3.3 hours. If 1 gram of this isotope is present initially, how long will it take for 29% of the lead to decay? Type your answer in hours in the space provided below. Round your answer to two decimal places.
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