SOLUTION: The strontium-90 in a nuclear reactor decays continuously. If 200 mg is present initially, the amount present after t years is given by A(t)=200e^-0.0248t. Find, to nearest hundred

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Question 598559: The strontium-90 in a nuclear reactor decays continuously. If 200 mg is present initially, the amount present after t years is given by A(t)=200e^-0.0248t. Find, to nearest hundredth, the amount letft after 50 years.
I really could use some help with this word problem. I would greatly appreciate your help and I thank you.

Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
The strontium-90 in a nuclear reactor decays continuously.
If 200 mg is present initially, the amount present after t years is given by A(t) = 200e^-0.0248t. Find, to nearest hundredth, the amount left after 50 years.
:
50 yrs means t = 50
A = 200%2Ae%5E%28-.0248%2A50%29
:
A = 200%2Ae%5E%28-1.24%29
A = 200 * .289384
A = 57.88 mg after 50 yrs