To determine which statements are true, let's evaluate each one involving rational approximations.
-
\(\sqrt{71}\) is less than \(\sqrt{61}\):
- To see if this is true, we compare the numbers:
\(\sqrt{71} \approx 8.426\) and \(\sqrt{61} \approx 7.810\).
- Therefore, \(\sqrt{71} > \sqrt{61}\).
- To see if this is true, we compare the numbers:
\(\sqrt{71} \approx 8.426\) and \(\sqrt{61} \approx 7.810\).
-
\(\sqrt{71}\) is greater than \(\sqrt{61}\):
- Based on the above calculation, this is true: \(\sqrt{71} > \sqrt{61}\).
-
\(\sqrt{81}\) is less than 9:
- Since \(\sqrt{81} = 9\), this statement is false.
-
\(\sqrt{81}\) is more than 9:
- As established, \(\sqrt{81} = 9\), so this statement is also false.
Conclusion:
The true statement is: \(\sqrt{71}\) is greater than \(\sqrt{61}\).