Answer
$\displaystyle \lim_{t\rightarrow\infty}A(t)=25.$
The percentage will eventually level off to $ 25\%$.
Work Step by Step
$t$ is "approaching $+\infty$" means that $t$ is assuming positive values of greater and greater magnitude.
See table below.
As $t$ assumes positive values of greater and greater magnitude, the function value approaches the value $25$.
So, we write
$\displaystyle \lim_{t\rightarrow\infty}A(t)=25.$
Thus, the percentage will eventually level off to $ 25\%$.
