Chapter 8.1B, Problem 4A

To determine

a.

To find:

Whether $\sqrt{78}$ is an irrational number or not.

To determine

b.

To find:

Whether $\sqrt{81}$ is an irrational number or not.

To determine

c.

To find:

Whether $\sqrt[3]{343}$ is an irrational number or not.

To determine

d.

To find:

Whether $3+\sqrt{81}$ is an irrational number or not.

To determine

e.

To find:

Whether $2÷\sqrt{2}$ is an irrational number or not.