What is an example of a real number that is not irrational?

The choice of 3.14 as an example of a real number that is not irrational is accurate because 3.14 is a rational number. Rational numbers are defined as numbers that can be expressed as the quotient of two integers, where the denominator is not zero. In this case, 3.14 can be expressed as 314/100, which is a fraction of two integers (314 and 100).

This distinguishes it from the other options listed. For instance, √5 is an irrational number because it cannot be expressed as a fraction of two integers; its decimal representation is non-repeating and non-terminating. Similarly, √-3 is not a real number at all, as it represents an imaginary number. Lastly, π is also an irrational number because it also cannot be expressed as a ratio of integers and has a non-repeating, non-terminating decimal expansion. Thus, 3.14 stands out as the only option that is a rational number and, therefore, not irrational.