Question

Which best explains what determines whether a number is irrational?

Answer 1

Is it squared rationally?
Is it a repeating decimal?

Every /non/-repeating decimal is irrational, as well all fractions. 

If you have anymore questions go to algebra.com.

Answer 2

1.) Is 64 squared rational or irrational?
Ans: Rational
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2.) Is -1.2 repeating decimal rational or irrational?
Every repeating decimal is rational.
Every non-repeating decimal is irrational.
All whole numbers are rational.
All fractions are rational.
nth roots of a^k are irrational unless k is a multiply of n.
Example: The cube root of 3^6 is rational but the cube root of 3^5 is not.
Cheers,
Stan H.