## brucebaner one year ago help me @nikato @astrophysicis

1. brucebaner

2. brucebaner

a?

3. Astrophysics

No, $\sqrt{36} = 6 \implies \frac{ 6 }{ 1 } \implies rational$

4. brucebaner

b

5. Astrophysics

There is only one obvious one, that should stick out.

6. Astrophysics

7. Astrophysics

What is the $\sqrt{49} ?$

8. brucebaner

sorry guys im not good at this :(

9. Astrophysics

Remember irrational numbers can't be written as fractions so something like pi, pi = 3.14159265....and you cannot simplify it into a ratio.

10. Astrophysics

It's ok, don't worry that's why we're here to help you understand :)

11. Astrophysics

$\sqrt{49} \implies 7 \implies \frac{ 7 }{ 1 }$ so is this rational or irrational?

12. brucebaner

rational

13. Astrophysics

Good! Because we can treat it as a simple fraction, now the next one, do you think we can treat is as the others?

14. Astrophysics

You would need a calculator for this one, so that should give you some hint :P

15. brucebaner

so i think D

16. Astrophysics

Why is D irrational?

17. Astrophysics

What is the square root of 121

18. brucebaner

11

19. brucebaner

@Astrophysics

20. Astrophysics

Yes, good bruce, so we can treat that as 11/1 right, so that will be rational as well, meaning our answer is? :)

21. brucebaner

c

22. brucebaner

can you help me with 1 more?