Using rational approximations, what statement is true?

options:

√48 > √36

√49 < 7

√49 > 7

√48 < √36

1 answer

To analyze the statements provided using rational approximations, let's evaluate the values of the square roots:

  1. √48: We know that \( \sqrt{48} = \sqrt{16 \times 3} = 4\sqrt{3} \). Approximating \( \sqrt{3} \approx 1.732 \), we have: \[ \sqrt{48} \approx 4 \times 1.732 = 6.928 \]

  2. √36: This is straightforward, as \( \sqrt{36} = 6 \).

  3. √49: This is also straightforward, as \( \sqrt{49} = 7 \).

Now let's evaluate the options:

  1. √48 > √36

    • We have \( \sqrt{48} \approx 6.928 \) and \( \sqrt{36} = 6 \). So, this statement is true.
  2. √49 < 7

    • Since \( \sqrt{49} = 7 \), this statement is false.
  3. √49 > 7

    • Also false, because \( \sqrt{49} = 7 \).
  4. √48 < √36

    • False, as we determined \( \sqrt{48} \approx 6.928 > 6 \).

The only true statement is:

√48 > √36.