SOLUTION: A scientist has 10 grams of a radioactive substance with a half-life of 8 days. The formula A = 10(0.5)^(t/8) tells how much will be left after t days. How many days, to the neares

Algebra ->  Exponential-and-logarithmic-functions -> SOLUTION: A scientist has 10 grams of a radioactive substance with a half-life of 8 days. The formula A = 10(0.5)^(t/8) tells how much will be left after t days. How many days, to the neares      Log On


   

Question 1106343: A scientist has 10 grams of a radioactive substance with a half-life of 8 days. The formula A = 10(0.5)^(t/8) tells how much will be left after t days. How many days, to the nearest tenth,will it take until only 1 gram is left?
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
A=10%280.5%29%5E%28t%2F8%29


10%280.5%29%5E%28t%2F8%29=1


0.5%5E%28t%2F8%29=0.1


You do the rest. Continue here by taking log of both sides...