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The Decay of 921 Mg of an Isotope Is Given

Question 402

Multiple Choice

The decay of 921 mg of an isotope is given by A(t) = 921e-0.031t, where t is time in years. Find the amount left after 41 years.

A) 258 mg
B) 129 mg
C) 251 mg
D) 893 mg

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