mooshoorama
New member
- Joined
- Feb 11, 2007
- Messages
- 1
Radium-226 has a half life of 1620 years. If 10mg of this material are initially present in a container and additional radium-226 is added to the container at a constant rate of .002 mg/year, find the amount of the material in the container at any time and the time period during which this material is reduced to three-fourths of its original amount. Then find the limiting amount as t approaches positive infinity.
I've figured out that the K in this problem is:
. . .K = 4.28x10^-4.
The answer that my teacher gave is:
. . .Q(t) = 4.673 + 5.327e^(-4.28x10^-4)
But I can't figure out how the teacher got that answer. Ideas? Thank you!
I've figured out that the K in this problem is:
. . .K = 4.28x10^-4.
The answer that my teacher gave is:
. . .Q(t) = 4.673 + 5.327e^(-4.28x10^-4)
But I can't figure out how the teacher got that answer. Ideas? Thank you!