Which expression represents rational numbers? Select all that apply

Answer:
1. [tex]\sqrt{100} \sqrt{100}[/tex]
2. 13.5 + [tex]\sqrt{81}[/tex]
3. [tex]\sqrt{9} + \sqrt{729}[/tex]
6. [tex]\frac{3}{5} + 2.5
These four options are rational;
Step-by-step explanation:
1. [tex]\sqrt{100} \sqrt{100}[/tex] equals to 10 * 10 = 100 which is rational
2. 13.5 + [tex]\sqrt{81}[/tex] equals 13.5 + 9 = 22.5
3. [tex]\sqrt{9} + \sqrt{729}[/tex] -- 3+27 = 30
6. [tex]\frac{3}{5} + 2.5\\\frac{3+12.5}{5}\\\frac{15.5}{5}\\= 3.1[/tex]
Option 4 and 5 are irrational because they include [tex]\sqrt{353}[/tex] and [tex]\sqrt{216}[/tex] which are not a perfect square and their answers will be non recurring and non terminating decimal fraction.