To determine which numbers are rational, we need to remember that a rational number can be expressed as the quotient of two integers (a fraction), where the denominator is not zero.
Let’s check the given responses:
-
\(16−−√\) (square root of 16):
- \(\sqrt{16} = 4\), which is a whole number. This is a rational number.
-
\(32−−√\) (square root of 32):
- \(\sqrt{32} = \sqrt{16 \times 2} = 4\sqrt{2}\). Since \(\sqrt{2}\) is an irrational number, \(4\sqrt{2}\) is also irrational. This is not a rational number.
-
\(70−−√\) (square root of 70):
- \(\sqrt{70}\) cannot be expressed as a fraction of two integers, so it is irrational. This is not a rational number.
-
\(\pi\):
- \(\pi\) is known to be an irrational number. This is not a rational number.
-
\(121712 \over 174\):
- This is a fraction representing the division of two integers (121712 and 174), so it is a rational number.
-
\(52525252.. \) (recurring decimal):
- The notation \(0.52525252...\) (which denotes \(0.52\) repeating) is a rational number because it can be expressed as a fraction.
Based on the analysis, the rational numbers among the options are:
- \( \sqrt{16} \) (4)
- \( \frac{121712}{174} \)
- \( 0.52525252... \) (the repeating decimal)
So the correct responses are:
- \( \sqrt{16} \)
- \( \frac{121712}{174} \)
- \( 0.52525252... \)