Help please I’ll give BRAINLEST thing if u do easy

Answer:
rational
Step-by-step explanation:
[tex] \sqrt{42.25} \\ \\ = 6.5 \\ \\ = \frac{65}{10} \\ \\ = \frac{13}{2} \:this \: is \: a \: rational \: number \\ \implies \: \sqrt{42.25} \: is \: also \: rational[/tex]