Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
0.45 MBq /(decay constant of Y-90)*(1- 2^(- 1 week / (half life of Y-90))
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random