6. The radioactive isotope of lead, PB-209, decays at a rate proportional to the amount present at time tand has a half-life of 3.3 hours. If 1 gram of lead is present initially, how long will it take for 90% of the lead to decay?

Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter2: Exponential, Logarithmic, And Trigonometric Functions
Section2.3: Applications: Growth And Decay
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6. The radioactive isotope of lead, PB-209, decays at a rate proportional to the amount present
at time tand has a half-life of 3.3 hours. If 1 gram of lead is present initially, how long will it
take for 90% of the lead to decay?
Transcribed Image Text:6. The radioactive isotope of lead, PB-209, decays at a rate proportional to the amount present at time tand has a half-life of 3.3 hours. If 1 gram of lead is present initially, how long will it take for 90% of the lead to decay?
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