I cant answer if there is no info
Answer:
Step-by-step explanation
you are able to make two squares because you can use the square root of 36 and that twill give you 6 not a decimal.
in comparison if you do the square root of 15 it will give you 3.87298335
The best estimate would be 121/15 = 8.1
B is the answer to the question 6.8