636cm.
This can be found with the Pythagorean Theorem which will give you a side length of 4.5

meters, which rounds to roughly 636cm.
Answer:
B
Step-by-step explanation:
I think this is more of an opinion question. What someone could solve mentally may not be the same as someone else's.If it were my worksheet, I'd circle all of them but it may be different for you.
At your level, I'd probably circle:
54 - 10
93 - 20
and 39 - 2
4 terms, degree of 2
The terms is the amount of “numbers” you have, which is 4
The degree is the highest power, which is x^2
Each person will get two and one quarter (2.25) pies