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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



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Your Pal Papaguy



√12   irrational  = 2 sqrt (3)

19/5    irrational  cannot be simplified

√49   rational   = 7

0.3425563758    if this is the last number rational  if this continues  irrational

√4/25   rational   2/5

√1/8    irrational = 1/(2sqrt(2))

0.6  rational