A certain radioactive substance decomposes at a rate proportional to the amount present. Of the 1000 mg originally present, 67 mg is lost after 100 years. What is the half-life period of this substance?
A certain radioactive substance decomposes at a rate proportional to the amount present. Of the 1000 mg originally present, 67 mg is lost after 100 years. What is the half-life period of this substance?
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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Transcribed Image Text:A certain radioactive substance
decomposes at a rate proportional to the
amount present. Of the 1000 mg originally
present, 67 mg is lost after 100 years. What
is the half-life period of this substance?
Select the correct response:
10 years
10 millennium
10 centuries
O 10 decades
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