A typical formula for exponential decay is y(t) = c*exp(-r*t) , where r > 0. The domain is all reals, and the range is all positive reals, since a positive-base exponential always returns a positive value.
Well, It's been a while since I was in Calc, but basicly for the domain, what values of X would make the equation invalid. Since 4-x is under the root/ratical, then 4-x must be greater than 0 or else...
Exponential decay occurs whenever the size of a quantity is decreasing by the same percentage each unit of time. new value=initial value x (1-r)^t where t =time and r =rate/100 The fixed amount of...