SOLUTION: the half life of strontium-90 is approximately 28 years. write a formula,p(t), that models the percent of strontium-90 after t years. (hint: we are starting with 100%). i am not su

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Question 449335: the half life of strontium-90 is approximately 28 years. write a formula,p(t), that models the percent of strontium-90 after t years. (hint: we are starting with 100%). i am not sure what formula to use or how to set it up. i am thinking it might be the expenential function but not sure how to set it up?
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
the half life of strontium-90 is approximately 28 years.
write a formula,p(t), that models the percent of strontium-90 after t years.
:
The radioactive decay formula
A = Ao*2^(-t/h)
Where
A = resulting amt after t time
Ao - initial amt
h = half-life of substance
t = time of decay
:
To find percent here, you could write it
p(t) = 100*2^(-t/28)