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Mathematics 9 Online
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.

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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