Which is irrational? (1 point) 23.85, square root of 49, square root of 23, 1/2

Answer 1

The number that is irrational among the options given is the square root of 23.

• 23.85 is a decimal (and can be expressed as a fraction).
• The square root of 49 is 7, which is a rational number.
• The square root of 23 is not a perfect square and cannot be expressed as a fraction, making it irrational.
• 1/2 is a rational number.

Therefore, the answer is the square root of 23.