Represent $\sqrt{5.6}$ on the number line.

Represent geometrically numbers on the number line:

$\sqrt{8.1}$

Represent $\sqrt{6}$ on the number line.

Insert a rational number and an irrational number between the following:

$0.0001$ and $0.001$

Simplify the following:

$\frac{\sqrt{24}}{8}+\frac{\sqrt{54}}{9}$

Simplify the following:

$\sqrt[4]{81}-8 \sqrt[3]{216}+15 \sqrt[5]{32}+\sqrt{225}$