Question 120076
How can you determine if a number is rational or irrational? 


1.) Is 64 squared rational or irrational?
Ans: Rational
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2.) Is -1.2 repeating decimal rational or irrational?
Ans: Rational
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Every repeating decimal is rational.
Every non-repeating decimal is irrational.
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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.
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Cheers,
Stan H.