Answer:
A rational number is any number that can be expressed as a whole number, a fraction, or as a non repeating decimal. Otherwise, it is an irrational number.
19/5: it is a rational number because it is in fraction form
√12: this is an irrational number
√49: this is a rational number because when you simplify this you will get the answer 7, that is a whole number.
0.3425563758: This is a decimal, hence, this is rational.
4/25 : it is a fraction so it is a rational number.
√1/8: this is an irrational number
√0.6¯: this is an irrational number