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Calculus: Early Transcendentals
8th Edition
ISBN: 9781285741550
Author: James Stewart
Publisher: Cengage Learning
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
Transcribed Image Text:9. A radioactive substance is safe to handle when there is less than 1 gram left of it. If the substance has a decay rate of 70% per year, how long will it be before a 150 g
substance is safe to handle?
O between 1 and 2 years
between 10 and 12 years
O between 7 and 8 years
O between 5 and 6 years
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