Can someone help me with this Physics question please? Q. The half-life of tritium (hydrogen-3) is 12.3 years. If 48.0mg of tritium is released from a nuclear power plant during the course of a mishap, what mass of the sample will remain after 49.2 years?​

Explanation:

The formula for this, the easy one, is

where No is the initial amount of the element, t is the time in years, and H is the half life. Filling in:

and simplifying a bit:

and

N = 48.0(.0625) so

N = 3 mg left after 12.3 years

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