Answer: OPTION A.
Step-by-step explanation:
By definition:
A number is Rational when it can be written as a simple fraction.
A number is Irrational when it cannot be written as a simple fraction.
Notice that:
[tex]\frac{2}{5}[/tex] is a Rational number.
[tex]\sqrt{88}=2\sqrt{2}[/tex] It is an irrational number.
Therefore, the sum of these numbers is an Irrational number:
[tex]\frac{2}{5} + \sqrt{88}=\frac{2}{5} + 2\sqrt{22}=9.78083151...[/tex]
