Respuesta :

DeanR

A half life of 102 years means a decay formula something like

[tex]A = A_0 \times 2^{-t/102}[/tex]

When t=250,

[tex]\dfrac{A}{A_0} = 2^{-250/102} \approx 0.182886[/tex]

Answer: 18.3%



kamizam38
The formula for finding the half life is

Final amount= initial amount * 0.5^(time/half life)

Final amount = 22*0.5^(250\102)
= 22^0.5^(2.4509..)
= 22*0.18288..
= 4.02350054
=4.02g

Hope this helps!