SOLUTION: The half-life of a radioactive isotope is the time it takes for a quantity of the isotope to be reduced to half its initial mass. Starting with 155 grams of a radioactive isotope,

Algebra ->  Percentage-and-ratio-word-problems -> SOLUTION: The half-life of a radioactive isotope is the time it takes for a quantity of the isotope to be reduced to half its initial mass. Starting with 155 grams of a radioactive isotope,       Log On


   



Question 1030480: The half-life of a radioactive isotope is the time it takes for a quantity of the isotope to be reduced to half its initial mass. Starting with 155 grams of a radioactive isotope, how much will be left after 3 half-life's?
Round to the nearest gram.

Answer by ikleyn(52817) About Me  (Show Source):
You can put this solution on YOUR website!
.
The half-life of a radioactive isotope is the time it takes for a quantity of the isotope to be reduced to half its initial mass.
Starting with 155 grams of a radioactive isotope, how much will be left after 3 half-life's?
Round to the nearest gram.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~

It will be  155%2F2  after the first  half-life,
            155%2F4  after the second half-life,  and
            155%2F8  after the third  half-life.