Measurements of the radioactivity of a certain isotope tell you that the decay rate decreases from...

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Measurements of the radioactivity of a certain isotope tell you that the decay rate decreases from...

Measurements of the radioactivity of a certain isotope tell you that the decay rate decreases from 8315 decaysperminute to 3040 decaysperminute over a period of 4.00 days .What is the half-life T1/2 of this isotope?

T_ ( 1 / 2 )?? ____ Days

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