Which of the following is a rational number?
a. square root 21
b. square root 144
c. square root 51
d. square root 85

Question

Which of the following is a rational number?
a.  square root 21
b. square root 144
c. square root 51
d. square root 85

anonymous · Answer

B square root of 144 which is 12

anonymous · Answer

none of the other options can be simplified into fractions or whole numbers

anonymous · Answer

r u positive? cause i asked another question on here and they got it wrong.

anonymous · Answer

Yes I'm positive...a rational number is any number that can be represented as a fraction with a denominator not equal to zero if you plug each one of the options into a calculator, you will see that only square root of 144 can be written as a fraction (12/1)

anonymous · Answer

thx. :)