What is the square root for 100?

The square root of 100 is 10.

is π a rational or irrational number?

The number π (pi) is an irrational number.

√110 a rational or irrational number?

The square root of 110 is an irrational number.

√81 a rational or irrational number?

The square root of 81 is a rational number. Specifically, it is 9.

√14 a rational or irrational number?

The square root of 14 is an irrational number.

-2/3 a rational or irrational number?