√21
D is exactly 6
Which of these numbers can be classified as both real and irrational?
a. 5.85
b. 63.4
c. square root 21
d. square root 36
Is the answer D?
3 answers
So The answer is D?
Is 6 a rational number?
YES!
So, D is NOT the answer!
A and B are also rational numbers. They are terminating decimals, so they are rational.
Since 21 is not a perfect square (it is between 16 and 25) its square root is not rational.
YES!
So, D is NOT the answer!
A and B are also rational numbers. They are terminating decimals, so they are rational.
Since 21 is not a perfect square (it is between 16 and 25) its square root is not rational.
91 answers