Question

Which of the following is a rational number? (4 points)

square root 15 square root 16, square root 21, square root 22

Answer 1

Explanation:

square root 15 = irrational

square root 16 = 4 = rational

square root 21 = irrational

square root 22 = irrational

Answer 2

The correct answer is the square root of 16.

Explanation:

The square root of 16 is 4, which is a whole number. Whole numbers are rational.

This eliminates the rest of the answers, but the square root of 15 has an infinite decimal, as well as the square root of 21 and 22.

Hope this helps! :)