2. A radioactive substance decays so that after t years, the amount remaining, expressed as a percent of the original amount, is A(t) = 100(1.3). [A-5] a) What is the half-life for this substance? Round to 2 decimal places. b) Determine the rate of decay after 10 years. Round to 2 decimal places.
2. A radioactive substance decays so that after t years, the amount remaining, expressed as a percent of the original amount, is A(t) = 100(1.3). [A-5] a) What is the half-life for this substance? Round to 2 decimal places. b) Determine the rate of decay after 10 years. Round to 2 decimal places.
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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![2. A radioactive substance decays so that after t years, the amount remaining, expressed as a percent of the original
amount, is A(t) = 100(1.3)¯t.
[A-5]
a) What is the half-life for this substance? Round to 2 decimal places.
b) Determine the rate of decay after 10 years. Round to 2 decimal places.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fad12620d-89f3-4199-a790-8c97e3445c91%2Fde943c73-8640-454d-9ea5-bc3c4e5b3051%2Furny0oi_processed.jpeg&w=3840&q=75)
Transcribed Image Text:2. A radioactive substance decays so that after t years, the amount remaining, expressed as a percent of the original
amount, is A(t) = 100(1.3)¯t.
[A-5]
a) What is the half-life for this substance? Round to 2 decimal places.
b) Determine the rate of decay after 10 years. Round to 2 decimal places.
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