Respuesta :

 all except pi are rational. 

2.333... = 21/9 
1.5 = 3/2

Answer: Third Option is correct.

Step-by-step explanation:

Since we have given that

1) 1.5- it  is a rational number as it can be written in [tex]\frac{p}{q}[/tex] form.

i.e. [tex]1.5=\frac{15}{10}=\frac{3}{2}[/tex]

2) [tex]\frac{8}{9}[/tex]- It is a rational number as it is written in  [tex]\frac{p}{q}[/tex] form.

3) 2.3 - It is a rational number as it can be written in  [tex]\frac{p}{q}[/tex] form.

i.e. [tex]2.3=\frac{23}{10}[/tex]

4) pi - It is irrational number as it can't be written in  [tex]\frac{p}{q}[/tex] form.

Hence, Third Option is correct.