The half-life of cobalt-60 is 5.20 y. How many milligrams of a 6.000-mg sample remain after 10.5 years?

Name: The half-life of cobalt-60 is 5.20 y. How many milligrams of a 6.000-mg sample remain after 10.5 years?
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The half-life formula is used to calculate the remaining amount: N = N0 * (1/2)^(t/T), where N0 is the initial amount, t is the time elapsed, and T is the half-life. For cobalt-60, after 10.5 years (which is 2.019 half-lives), the remaining amount is approximately 1.48 mg.

The Half-Life of Cobalt-60 Is 5