An isotope of lead, 201Pb, has a half-life of 8.4 hours. How many hours ago was there 20% more of the substance? (Round your answer to one decimal place.) 2 2000
An isotope of lead, 201Pb, has a half-life of 8.4 hours. How many hours ago was there 20% more of the substance? (Round your answer to one decimal place.) 2 2000
Chapter6: Exponential And Logarithmic Functions
Section6.6: Exponential And Logarithmic Equations
Problem 13TI: How long will it take before twenty percent of our 1,000 -gram sample of uranium- 235 has decayed?
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