SOLUTION: I need help solving this! How long will it take a sample radioactive substance to decay to half of its original amount, if it decays according to the function A(t)=450e^-0.157t, wh
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Question 276156: I need help solving this! How long will it take a sample radioactive substance to decay to half of its original amount, if it decays according to the function A(t)=450e^-0.157t, where t is the time years? Round to the nearest hundreth year.
Answer by scott8148(6628) (Show Source): You can put this solution on YOUR website!
1/2 = 450 e^(-0.157t)
.5 / 450 = e^(-0.157t)
ln(.5 / 450) = -0.157 t
[ln(.5 / 450)] / (-0.157) = t
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