SOLUTION: The half-life of a radioactive substance is 33.3 years. a. Find the exponential decay model for this substance. b. How long will it take a sample of 400 grams to decay to 300 gra

Algebra ->  Exponential-and-logarithmic-functions -> SOLUTION: The half-life of a radioactive substance is 33.3 years. a. Find the exponential decay model for this substance. b. How long will it take a sample of 400 grams to decay to 300 gra      Log On


   

Question 1198677: The half-life of a radioactive substance is 33.3 years.
a. Find the exponential decay model for this substance.
b. How long will it take a sample of 400 grams to decay to 300 grams?
c. How much of the sample of 400 grams will remain after 20 years?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
y=p%281%2F2%29%5E%28x%2F33.3%29 for p any initial amount, y final amount after x time in years