Answer:
Irrational numbers can look like fractions: 

Irrational numbers have never ending decimals. Pi and e are also irrational numbers.
If you're asking how to simplify, then this is how you do it.
when a power meets another power but in brackets, then you have to multiply the powers. ¼ × 4 would be 1. i simplified 81 to 3⁴.
Answer:
21
Step-by-step explanation:
Irrational because it can not be written as a fraction