Question 1060946
What you meant is that {{{t}}} months after {{{40}}} butterflies  are introduced, the  habitat will contain {{{f(t)=400/(1+9*e^(-0.22t))}}} butterflies.
That tells you that for {{{t=0}}} , {{{f(0)=40}}} ,
and {{{f(t)}}} increases with {{{t}}} , but {{{f(t)<400}}} at all times.
For {{{t=12}}} , the approximate calculation (rounding to whole numbers) is
{{{f(12)=400/(1+9*e^(-0.22*12))=400/(1+9*e^(-2.46))=400/(1+9*0.071361)=400/(1+0.64225)=400/1.64225=244}}} .
 
NOTE: Since the problem is multiple choice, with only one choice below 400,
and the function tells you that {{{f(t)<400}}} at all times,
the only choice was c) 244 butteries.
No calculation was needed in this case.