Question

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Which number is irrational?

A. http://static.k12.com/bank_packages/files/media/d021d3e103021915c1132975becc9fb3.png
B. http://static.k12.com/bank_packages/files/media/0f7f911c7eb90e2837c0d0cd4aec8fa7.png
C. http://static.k12.com/bank_packages/files/media/a64ee72aff4464a4d976c288ba3a0dc4.png
D. http://static.k12.com/bank_packages/files/media/4f7d15e3fd933e0c48a4d6a34f999ae3.png

Answer 1

for A.
64/2 =32
and 32 is NOT a perfect square.

for B.
repeating decimal is actually a fraction, and what do you know about fractions?
(that they are ____ numbers).

for C.
Again, fraction is a ____ number?
(rational or irrational ?)

for D.
25 and 81 are both perfect squares/

Answer 2

for A.
what do you know about a square root of a non-perfect square?

Answer 3

A?

Answer 4

yes, A is irrational.

Answer 5

Thank-You. @SolomonZelman

Answer 6

yw