1. ## worded log problem

I am lost. Please help me solve this. I know it will be simple if I can just see it. Thanx.
A sample of 500g of radioactive lead 210 decays to polonium 210 acording to the function defined by A(t)= 500e^-.32t,t is for time in years. find the amount of the sample remaining after 4 years. There is more but I think I can find it if I have this part. Thanx

2. Originally Posted by whiteowl
I am lost. Please help me solve this. I know it will be simple if I can just see it. Thanx.
A sample of 500g of radioactive lead 210 decays to polonium 210 acording to the function defined by A(t)= 500e^-.32t,t is for time in years. find the amount of the sample remaining after 4 years. There is more but I think I can find it if I have this part. Thanx
$A(t)$ gives the amount of lead remaining after $t$ years, so just evaluate $A(4)$.

3. Originally Posted by whiteowl
I am lost. Please help me solve this. I know it will be simple if I can just see it. Thanx.
A sample of 500g of radioactive lead 210 decays to polonium 210 acording to the function defined by A(t)= 500e^-.32t,t is for time in years. find the amount of the sample remaining after 4 years. There is more but I think I can find it if I have this part. Thanx
This is an application of the "Plug and Chug" Theorem!

$A(4) = 500*e^{-0.32*4} \Rightarrow 139.02$

4. Thanx for the help. I finnally figured out how to plug it in to the calculator. I did not know how to plug in e. Agian thanx