Answer
$s=10$ is not a solution.
Work Step by Step
The given value into the inequality. If the resullting statement is true, then the given value is a solution.
$\begin{align*}
-5 \div (2s)&\stackrel{}{<}-1\\
-5\div [2(10)]&\stackrel{?}{<}-1\\
-5\div 20&\stackrel{?}{<}-1\\
-\frac{1}{4}&\not<-1
\end{align*}$
Thus, the given value is NOT a solution.
