A repeating decimal like 0.2222222.... is a Response area number and can be written as the fraction Response area.
A stopping decimal like 0.22 is a rational number and can be written as the fraction Response area.
A non-stopping and non-repeating decimal like 0.1234567891011... or 0.121121112... is a Response area number can be written as the fraction Response area.
The square root of a Response area is a rational number and also a whole number.
The square root of a Response area is an irrational number.