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The half-life of a radioactive substance is 13 days. After 2 days a sample of the substance has been reduced to a mass of 3 mg. What was the initial mass (in mg) of the sample? Round your answer to 2 decimal places as needed. 3.34 Using your answer from above, after how many days will there only be 0.2 mg of substance left? 052.8 Round your answer to 2 decimal places as needed.

The half-life of a radioactive substance is 13 days. After 2 days a sample of the substance has been reduced to a mass of 3 mg. What was the initial mass (in mg) of the sample? Round your answer to 2 decimal places as needed. 3.34 Using your answer from above, after how many days will there only be 0.2 mg of substance left? 052.8 Round your answer to 2 decimal places as needed.

Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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The half-life of a radioactive substance is 13 days. After 2 days a sample of the substance has been reduced to a mass of 3 mg. What was the initial mass (in mg) of the sample? Round your answer to 2 decimal places as needed. 3.34 Using your answer from above, after how many days will there only be 0.2 mg of substance left? 052.8 Round your answer to 2 decimal places as needed.
Transcribed Image Text:The half-life of a radioactive substance is 13 days. After 2 days a sample of the substance has been reduced to a mass of 3 mg. What was the initial mass (in mg) of the sample? Round your answer to 2 decimal places as needed. 3.34 Using your answer from above, after how many days will there only be 0.2 mg of substance left? 052.8 Round your answer to 2 decimal places as needed.
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