Final answer:
3.14 is a rational number because it can be written as a fraction with integers in the numerator and a non-zero integer in the denominator.
Step-by-step explanation:
Yes, 3.14 is a rational number. A rational number is defined as a number that can be expressed as the quotient or fraction ⅔ of two integers, where the numerator is an integer and the denominator is a non-zero integer. The number 3.14 can be written as ⅔⅔/100, which fits the definition of a rational number.