SOLUTION: A radioactive material has a half-life of 3 minutes. If you begin with 512000 radioactive atoms, approximately how many would u expect to have after 12 minutes.

Algebra ->  Logarithm Solvers, Trainers and Word Problems -> SOLUTION: A radioactive material has a half-life of 3 minutes. If you begin with 512000 radioactive atoms, approximately how many would u expect to have after 12 minutes.       Log On


   

Question 844089: A radioactive material has a half-life of 3 minutes. If you begin with 512000 radioactive atoms, approximately how many would u expect to have after 12 minutes.

Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

Q(t) =+Q%5B0%5De%5E%28-kt+%29

A radioactive material has a half-life of 3 minutes

Allows one to find k

  .5 =+e%5E%28-3k+%29

ln(.5)/-3 = k = .2310

Q(12) =+512000e%5E%28-.231%2A12+%29