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The amount of a radioactive substance remaining after t years is given by the function f(t) = m(0.5)t/h, where m is the initial mass and h is the half-life in years. Cobalt-60 has a half-life of about 5.3 years. Which equation gives the mass of a 50 mg Cobalt-60 sample remaining after 10 years, and approximately how many milligrams remain?
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