Answer
$|t|\ge20$
Work Step by Step
$\bf{\text{Solution Outline:}}$
Use the concept of inequality and absolute value to translate the given description,
\begin{array}{l}\require{cancel}
\text{the distance from $t$ to $0$ is at least $20$}
,\end{array}
to symbols.
$\bf{\text{Solution Details:}}$
The absolute value of $x$, written as $|x|,$ is the distance of $x$ from $0.$ Hence, in symbols, the given description is equivalent to
\begin{array}{l}\require{cancel}
|t|\ge20
.\end{array}
