The problem reads like so:
Using estimates of rainfall, evaporation, etc. The town engineer developed the following model for the amount of water in the town reservoir as a function of time:
where V is water volume in liters, t is time in days, and r is the towns consumption rate in liters per day. Write two user defined functions. The first function should define V(t) for use with the fzero function. The second function should use fzero to compute how long it will take for the water to decrease to percent of its initial value of L. The inputs of the second function should be and .
to be totally honest I don't have the foggiest of an idea on where to start. I'm not looking for anyone to hand me the answer, I just want to be pointed in the right direction.