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.
(1/root((15²+15²)*2pi)) (integrate exp( (-1/2) * ((x-(108-71))/root(15²+15²))²) from -inf to 0)
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random