What is 100 to the 20th power called?

Abag has more green balls than blue balls, and there is at least one blue ball. let bb represent the number of blue balls and let gg represent the number of green balls. let's compare the expressions 2b2b and b + gb+g. which statement is correct? choose 1

Which radical expression is a rational number? a. √ 360 b. √ 644 c. √ 225 d. √ 122

How do i answer this i do not get this at