x(t) = (148/3)e^(-6t) + 1
I am trying to find the amount of salt (x) in the tank at time = 40.
Out of interest I checked it out on wolframalpha, and
(148/3)e^(-240) is around 2.67E(-103) SO RIDICULOUSLY SMALL
but as soon as put the 'plus 1' on the end, it someone all simplifies down to...