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OpenStudy (anonymous):
The half-life of a radioactive substance is noe hundred fifty-three days. How many days will it take for seventy percent of the substance to decay? Show my how to do it not just the answer.
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OpenStudy (anonymous):
that means there is 30% remaining. So 0.3 = (1/2)^(t/153) solve for t = 265.8 days
OpenStudy (anonymous):
Okay, that's what I got. Thank you. :)
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