Step-by-step explanation:
We need to write the decimal number in fraction:
![5.6213\text{ = }(56213)/(10000)](https://img.qammunity.org/2023/formulas/mathematics/college/i1y5khz7ygqwh546iyvgb92qyu2nto0745.png)
If after converting from decimal to fraction, the number termintes, then it is rational.
If it doesn't terminate or it contnues without a pattern, it is irrational.
The fraction above te