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OpenStudy (anonymous):
plz explain The radioactive substance uranium-240 has a half-life of 14 hours. The amount A(t) of a sample of uranium-240 remaining (in grams) after t hours is given by the following exponential function. =A(t)=3900(1/2)^t/14 Amount after 40 years 3900(1/2)^40/14
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