To determine which numbers are rational, we need to identify whether each number can be expressed as a fraction of two integers (a/b, where a and b are integers and b ≠ 0).
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π (pi): This is an irrational number; it cannot be expressed as a fraction of two integers. Not rational.
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2.7: This can be expressed as \( \frac{27}{10} \), so it is a rational number. Rational.
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2.7112311: This is a decimal that terminates, so it can also be expressed as a fraction. Therefore, it is rational. Rational.
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\( \frac{11}{23} \): This is already in the form of a fraction, with both numbers being integers. Rational.
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\( \sqrt{14} \): This is an irrational number because 14 is not a perfect square. Not rational.
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\( \sqrt{7} \): This is also irrational because 7 is not a perfect square. Not rational.
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36: This is an integer and can be expressed as \( \frac{36}{1} \). Rational.
In summary, the rational numbers in the list are:
- 2.7
- 2.7112311
- \( \frac{11}{23} \)
- 36
So, the three that apply as rational numbers are:
- 2.7
- 2.7112311
- \( \frac{11}{23} \)