Select the correct description for each number set. ) c) (−2/3, 7/9, π2 ) d) (12√, 11√, π )
which numbers are ration or irrational
The numbers in set c) are rational because they can be expressed as a ratio of two integers (-2/3, 7/9) or as a fraction and a constant multiple of pi (π/2).
The numbers in set d) are irrational because they cannot be expressed as a ratio of two integers or as a fraction and a constant multiple of pi. The square root of 12 (√12) and the square root of 11 (√11) are both irrational numbers, and pi (π) is also an irrational number.