True or False

_____ 1. √x is read as "the square root of x".
_____ 2. Perfect squares are numbers that have irrational numbers as square roots.
_____ 3. A number multiplied by itself is called square root.
_____ 4. In ∛x, the symbol is radicand.
_____ 5. Since 10² = 100, then √100 = 2.
_____ 6. 8² = 16
_____ 7. -√4 = 2
_____ 8. √9 has two possible roots, 3 and -3
_____ 9. √81 = 9
_____ 10. A principal root is irrational if the radicand is not a perfect nth power.
_____ 11. √19 is irrational.
_____ 12. √25 is irrational.
_____ 13. √47 + 2 is irrational.
_____ 14. √20 lies between 4 and 5.
_____ 15. √149 lies between 144 and 169.

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