(a) p(t)=(pke^(rt))/((k-p)+pe^(rt))
Where p -is the initial population
      k -carrying capacity
      r -growth rate
So , we get
   (650*2600e^(0.9t))/((2600-650)+650e^(0.9t))
=(2600e^(0.9t))/(3+e^(0.9t))
Â
(b) t=1/rln(k-p)/p
   =1/0.9ln(2600-650)/650
   =1/0.9ln3
   =1.2207
(a)=(2600e^(0.9t))/(3+e^(0.9t))
(b)=1.2207
