12. A 30-mg sample of radioactive isotope decays to 27 mg in 12.5 h. (a) Calculate its half-life, to two decimal places. (b) How long will it take (to the nearest hour) until only 5 mg of the sample remain?
12. A 30-mg sample of radioactive isotope decays to 27 mg in 12.5 h. (a) Calculate its half-life, to two decimal places. (b) How long will it take (to the nearest hour) until only 5 mg of the sample remain?
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
Problem 20E: Half-Life The half-life of plutonium-241 is approximately 13 years. How much of a sample weighing 4...
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