[tex](f \circ g)(x)=\sqrt{\dfrac{2(4+\sqrt x)}{5}}=\sqrt{\dfrac{8+2\sqrt x}{5}}\\\\
(f \circ g)(9)=\sqrt{\dfrac{8+2\sqrt 9}{5}}\\
(f \circ g)(9)=\sqrt{\dfrac{8+6}{5}}\\
(f \circ g)(9)=\sqrt{\dfrac{14}{5}}\\
(f \circ g)(9)=\dfrac{\sqrt{14}}{\sqrt5}\\
(f \circ g)(9)=\dfrac{\sqrt{70}}{5}\approx41,83
[/tex]
