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

Answer 1

B square root of 144 which is 12

Answer 2

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

Answer 3

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

Answer 4

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)

Answer 5

thx. :)