#### Answer

$$\sqrt{41 } $$

#### Work Step by Step

Since speed given by
\begin{align*}
\frac{d s}{d t}&=\sqrt{x^{\prime}(t)^{2}+y^{\prime}(t)^{2}}\\
&=\sqrt{25+16 }
\end{align*}
Then
\begin{align*}
\frac{d s}{d t}\bigg|_{t= 9} &=\sqrt{25+16 } \\
&=\sqrt{41 }
\end{align*}