For this case, we have that by definition:
The rational numbers: are all those that can be represented as the quotient of two whole numbers or, an integer and a positive natural; that is, a common fraction [tex]\frac {a} {c}[/tex]with a and b distinct from zero.
Thus,[tex]\sqrt {9} = 3 = \frac {3} {1}[/tex]is rational
An irrational number is a number that can not be expressed as a fraction [tex]\frac {a} {c}[/tex], where a and c are integers and c is different from zero. Thus, [tex]\pi, \sqrt {8}\ and\ 3.8362319[/tex] are irrational numbers.
Answer:
[tex]\sqrt {9}[/tex]
