100 = n - 200*(ln(.5)/26.8)/((ln(.5)/26.8)+a) and 50 = ne^(-a*19.9)-200*(ln(.5)/26.8)e^((ln(.5)/26.8)*19.9)/((ln(.5)/26.8)+a) solve for a and n

Uh oh! Wolfram|Alpha doesn't run without JavaScript.

Please enable JavaScript. If you don't know how, you can find instructionshere.Once you've done that, refresh this page to start using Wolfram|Alpha.