In the Formula A(t) = A0ekt, a Is the Amount

question 334

Multiple Choice

In the formula A(t) = A0ekt, A is the amount of radioactive material remaining from an initial amount A0 at a given time t, and k is a negative constant determined by the nature of the material. A certain radioactive isotope
Decays at a rate of 0.3% annually. Determine the half-life of this isotope, to the nearest year.

• A) 167 yr
• B) 231 yr
• C) 2 yr
• D) 100 yr

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