QuestionUse the function $f(x)=\sqrt{x-4}$ to find $f(13)$ and $f(85)$. Simplify answers; note non-real results.

Studdy Solution
Calculate the square root of81.
$$f(85)=9$$The completed table is\begin{tabular}{|c|c|} \hline$x$ & $f(x)$ \\ \hline0 & Not a real number \\ \hline4 &0 \\ \hline13 &3 \\ \hline85 &9 \\ \hline\end{tabular}