SOLUTION: Bismuth-210 is an isotope that radioactively decays by about 13% each day, meaning 13% of the remaining Bismuth-210 transforms into another atom (polonium-210 in this case) each da

Algebra ->  Exponential-and-logarithmic-functions -> SOLUTION: Bismuth-210 is an isotope that radioactively decays by about 13% each day, meaning 13% of the remaining Bismuth-210 transforms into another atom (polonium-210 in this case) each da      Log On


   



Question 1068888: Bismuth-210 is an isotope that radioactively decays by about 13% each day, meaning 13% of the remaining Bismuth-210 transforms into another atom (polonium-210 in this case) each day. If you begin with 126 mg of Bismuth-210, how much remains after 5 days.
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
A decrease of 13% means 87% remains
A = 126*.87^5
A = 62.8 mg after 5 days