Question

The half-life of tritium is 12.4 years. How long will it take for 25% of a sample of tritium to decompose? (Round your answer to one decimal place.)

Answer 1

25% is the same as \(\frac{1}{4}\) so it takes two half lives

Answer 2

so i plug in \[\frac{ 1 }{ 4 }Ao=Aoe ^{-0.181t} \]

Answer 3

oh no

Answer 4

after one half life you have half (50%)
after two half lives you have one quarter (25%)

Answer 5

one half life is 12.4 years two half lives is 24.8 years
that is all

Answer 6

that was incorrect