#### Answer

$t=91$

#### Work Step by Step

Raising both sides to the $\text{
4th
}$ power, the solution to the given equation, $
\sqrt[4]{t-10}=3
$, is
\begin{array}{l}
t-10=81
\\\\
t=81+10
\\\\
t=91
.\end{array}
Upon checking, $
t=91
$ satisfies the given equation.