Question

the half life of a radioactive isotope is 4 days if 3.2 kg are present now then how much will be present in 4 days?

Answer 1

half

Answer 2

i mean half of 3.2
that is what half life means, the time it takes to get half of what you start with

Answer 3

but it says to use this formula: A(t)=Aob^t/k

Answer 4

it doesn't matter what the formula is, you are told the half life and asked how much will remain in exactly that time period. if the half life is 4 days then in 4 days you have half of what you start with

Answer 5

half life tells you exactly that
start with 3.2
in 4 days get 1.6
in 8 days get .8
in 12 days get .4
in 16 days get .2
in 20 days get .1 and so on

Answer 6

ok thanks

Answer 7

1.6 kg