please help me because I don't understand how to do it.:)

Answer:
sqrt(37) is closest to 6
Step-by-step explanation:
We know 6 is a rational number
Square 6
6*6 = 36
Which of our numbers is closest to 36
37
Now take the square root of each
sqrt(37) is closest to sqrt(36)
sqrt(37) is closest to 6