Yolo4mecuite 2 years ago Which number is irrational? Select one: a. √169 b. √144 c. √81 d. √156

1. Azteck

What's a rational number?

2. Yolo4mecuite

A rational number is a number that can be expressed as a fraction or ratio (rational). The numerator and the denominator of the fraction are both integers.

3. Azteck

A rational number can also be a whole number.

4. Azteck

so the square root of 169 is 13, correct?

5. Azteck

The number 13 is a rational number because it's a whole number.

6. godorovg

yes 13 is right for 169

7. Azteck

That means option A is not irrational, thus not the correct answer.

8. Azteck

Option B is not irrational as well because that will give you 12. So is option C. That also gives you a whole number of 9.

9. Azteck

Tell me what option D would give me? @Yolo4mecuite

10. godorovg

option D is 12.5 for squr 156

11. Yolo4mecuite

Yeah ^^^^

12. Yolo4mecuite

So D is rational

13. godorovg

no we are looking for irrational

14. Yolo4mecuite

Yes sorry

15. Yolo4mecuite

12.5 is not s whole number so it is irrational

16. godorovg

I knew it was D, was just trying to teach

17. Yolo4mecuite

Oh ok Thank you! :)

18. godorovg

hope I helped not hindered here.

19. Azteck

12.5 is a rational number. That's a fraction with integers. The square root of 156 does not contain recurring numbers which means it's irrational.

20. godorovg

yep you are right :)

21. godorovg

good job..

22. SWAG

Nice Work!