SOLUTION: he radioactive element americium-241 has a half-life of 432 years. Suppose we start with a 25-g mass of americium-241. How much will be left after 285 years? Compute the answer to

Algebra ->  Customizable Word Problem Solvers  -> Misc -> SOLUTION: he radioactive element americium-241 has a half-life of 432 years. Suppose we start with a 25-g mass of americium-241. How much will be left after 285 years? Compute the answer to      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 728036: he radioactive element americium-241 has a half-life of 432 years. Suppose we start with a 25-g mass of americium-241.
How much will be left after 285 years? Compute the answer to three significant digits.
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
The radioactive element americium-241 has a half-life of 432 years. Suppose we start with a 25-g mass of americium-241.
How much will be left after 285 years? Compute the answer to three significant digits.
---------
A(t) = Ao*(1/2)^t
-----
A(285) = 25(1/2)^(285/432)= 25*(0.633) = 15.83 grams
------------------
Cheers,
Stan H.