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.
Plot[{1000*E^(-E^(.33(2013 - x))), 1000*(1 + E^(.75(2013.5 - x)))^(-1)}, {x, 2007, 2020}]
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random