SOLUTION: Radioactive strontium-90 is used in nuclear reactors and decays according to A=Pe^-0.0248t where A is the amount remaining after t years. Find the time required for strontium-90 to

Question 688703: Radioactive strontium-90 is used in nuclear reactors and decays according to A=Pe^-0.0248t where A is the amount remaining after t years. Find the time required for strontium-90 to decay to 1/10 of the quantity present now?

Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
Radioactive strontium-90 is used in nuclear reactors and decays according to A=Pe^-0.0248t
where A is the amount remaining after t years.
Find the time required for strontium-90 to decay to 1/10 of the quantity present now?
:
Let the initial amt (P) = 1; A = .1

natural log of e = 1, therefore we can write it
-.0248t = ln(.1)
t = ; use a calc
t ~ 93 years
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