<PRE><B>Question 133130</B>
The number of grams of a certain radioactive substance present at time t is given by the formula A = 100e^-0.002t, where t is the number of years. Find the number of grams that are present at time t = 0 and time t = 300
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A(t) = 100e^-0.002t
A(0) = 100*1 = 100 grams
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A(300) = 100*e^(-0.002*300) = 100*0.548812
= 54.8812 grams
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Cheers,
Stan H.
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