Rational numbers are numbers that can be expressed as the quotient of two integers (i.e., \( \frac{a}{b} \) where \( b \neq 0 \)). Let's check each of the numbers given:
-
\( \sqrt{72} \): This is an irrational number since it cannot be expressed as a fraction of two integers.
-
2.7: This is a rational number because it can be expressed as \( \frac{27}{10} \).
-
\( \frac{11}{23} \): This is a rational number since it is already in the form of a fraction of two integers.
-
\( \sqrt{14} \): This is an irrational number as it cannot be expressed as a fraction of two integers.
-
\( \pi \): This is an irrational number.
-
\( \sqrt{36} \): This equals 6, which is a rational number since it can be expressed as \( \frac{6}{1} \).
Based on this analysis, the three numbers that are rational are:
- 2.7
- \( \frac{11}{23} \)
- \( \sqrt{36} \) (which is 6)
So, the rational numbers among the options are 2.7, \( \frac{11}{23} \), and \( \sqrt{36} \).