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An Irrational number is a non-rational number.
A rational number is one that can be represented as one whole number over another (non-zero) whole number.
0.06789 = 6789/100000 → one whole number over another whole number → 0.06789 is a rational number
→No. 0.06789 is not an irrational number.
No, it is not.
Yes.
7.11 is a rational number because it can be expressed as a fraction in the form of 711/100