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Solve the Problem tt (In Years) Is Given By A(t)=120e−.48tA(t)=120 e^{-.48 t}

Question 102

Multiple Choice

Solve the problem.
-Suppose that the amount in grams of a radioactive substance present at time tt (in years) is given by A(t) =120e−.48tA(t) =120 e^{-.48 t} . Find the rate of change of the quantity present at the time when t=6t=6 .


A) -3.2 grams per year
B) -17.7 grams per year
C) 17.7 grams per year
D) 3.2 grams per year

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