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.
20 + ( 25 - 20 ) + (25 - 20)*e^(-t*(.066)) =
20 + ( 25 - 20 ) + (25 - 20)*e^(-t*(.066)) =
Natural Language
Math Input
Extended Keyboard
