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Growth and Decay Problem 1.1 (complexity 2). Solution

The amount of a certain radioactive specimen present at time t (measured in seconds) is given by , where A(t) is the amount measured in grams. Find the half-life, T , of the specimen.

Solution
We must find the time when , that is, we must solve the equation
,
for t.
Taking natural logarithms on both sides,

Answer:

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