If a radioisotope has a half-life of 10 years, how much of the original material would remain after 40 years?

Question

anonymous · Answer

the initial amount is not given?

anonymous · Answer

no

anonymous · Answer

Formula:
$\Large  A=A_o • (\frac{1}{2})^{\frac{t}{h}}$
where A is the final amount
Ao is the orignal amount
t is the time
and h is the half life

anonymous · Answer

Thank you :)

anonymous · Answer

no problem ;p
and welcome to Openstudy !! (^_^)

anonymous · Answer

Thanks :) I'm liking it already.

anonymous · Answer

yeah, you should ^.^
it's very addicting , better than any other study sites
if you need help about this site you can ask me or the people who have an "A" beside their usernames, they are ambassadors :)

anonymous · Answer

What do the ambassadors do?

anonymous · Answer

@Compassionatee
he can tell you everything ;p

anonymous · Answer

@Compassionate

anonymous · Answer

Awesome! Thanks again for all your help :)