PLEASE HELPPPP!!!! EXPLAIN HOW U GOT THAT ANSWER

Answer:
D
Step-by-step explanation:
Solve
6
2 pi = 6.28
[tex]\sqrt{34\\}[/tex] = 5.8
[tex]\sqrt{42}[/tex] = 6.4
Then order them 5.8, 6, 6.28, 6.48 which is D