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).
-
π (pi): This is an irrational number; it cannot be expressed as a fraction of two integers. Not rational.
-
2.7: This can be expressed as
, so it is a rational number. Rational. -
2.7112311: This is a decimal that terminates, so it can also be expressed as a fraction. Therefore, it is rational. Rational.
-
: This is already in the form of a fraction, with both numbers being integers. Rational. -
: This is an irrational number because 14 is not a perfect square. Not rational. -
: This is also irrational because 7 is not a perfect square. Not rational. -
36: This is an integer and can be expressed as
. Rational.
In summary, the rational numbers in the list are:
- 2.7
- 2.7112311
- 36
So, the three that apply as rational numbers are:
- 2.7
- 2.7112311