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.
dp/dt = 0.2*p *(1 -p/400) - 0.06*p, p(0) =350
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random