Question
The radioactive isotope of lead, Pb-209, decays at a rate proportional to the amount present at time t and has a half-life of 3.3 hours.
The radioactive isotope of lead, Pb-209, decays at a rate proportional to the amount present at time t and has a half-life of 3.3 hours. If 1 gram of this isotope is present initially, how long will it take for 85% of the lead to decay? (Round your answer to two decimal places.) hr
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Calculus One And Several Variables
Authors: Saturnino L Salas, Garret J Etgen, Einar Hille
10th Edition
0470472766, 9780470472767
