#### Answer

$t=11$

#### Work Step by Step

Raising both sides to the $\text{
4th
}$ power, the solution to the given equation, $
\sqrt[4]{t+5}=2
$, is
\begin{array}{l}
t+5=16
\\\\
t=16-5
\\\\
t=11
.\end{array}
Upon checking, $
t=11
$ satisfies the given equation.