The decimal expansion of the number $\sqrt{2}$ is

Is $\sqrt{8^{2}+15^{2}}$ a rational number or an irrational number?

Are the square roots of all positive integers irrational? If not,give an example of the square root of a number that is a rational number.

Locate $\sqrt{2}$ on the number line.

Represent $\sqrt{20}$ on the number line.

For each question,select the proper option from the four options given to make the statement true: $(\sqrt{5}+3)^{2}$ is a / an $\ldots \ldots \ldots$ number.