Question

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 115 grams of a radioactive isotope, how much will be left after 6 half-lives?
round your answer to the nearest gram

Answer 1

@Directrix

Answer 2

Remaining Amount = 115 * (1/2)^6

115 * (1/2)^6 = ? to the nearest gram.

Read more about half-lives here: http://www.coolmath.com/algebra/17-exponentials-logarithms/13-radioactive-decay-decibel-levels-01

@bri97

Answer 3

1.796875 = 2

Answer 4

2 was right

Answer 5

Okay.