.
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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