Answer:
Any irrational number is added to 0.4 it will give an irrational number.
Step-by-step explanation:
We need to tell the number which produces an irrational number when added to 0.4.
An irrational number is a number which cannot be expressed in the form of fraction [tex]\frac{x}{y}[/tex]. In other words we can put that decimal expansion of an irrational number does not terminate or cease to end.
Now, if any irrational number is added to 0.4 it will give an irrational number.
Some examples could be: [tex]\sqrt2, \sqrt3, \pi[/tex] and any non-terminating number.
