Classify the number as rational or irrational.
Select Rational or Irrational for each number.

Rational. Irrational

0.5, are rational. √24, 3.42859873 are irrational.

Solution:

Rational numbers can be expressed as form.

Option A: 0.5

It is of the form .

Therefore 0.5 is a rational number.

Option B:

It cannot be simplified further. Roots are irrationals.

Therefore √24 is irrational.

Option C: 3.42859873

It cannot be written as form.

Therefore 3.42859873 is irrational.

Option D:

It is of the form .

Therefore is rational.