Which of the following is a rational number?

√-5            √4                6+2i

Which of the following is a rational number?

12 √2 i

Which of the following is a rational number?

  √3                10                       10+3i

Let a and b be nonzero integers and c be equal to 0. Which of the following is a rational number?

4ab²                a/c             b²/c

Let a and b be nonzero integers. Which of the following is a rational number?√-b         1/b            ab/0

Let a and b be nonzero integers. Which of the following is a rational number?√-ab         a/2b       b²/0

Which of the following is a rational number?

    √-10           √9             10-3i