Question

***WILL MEDAL***

Answer 1

1 and 3 are rational and 2 and 4 are rational

Answer 2

So there all rational?

Answer 3

@leon549 ?

Answer 4

an irrational number is any real number that cannot be expressed as a ratio of integers

Answer 5

and rational is its reciprocal

Answer 6

So 2 and 4 irrational

Answer 7

@leon549

Answer 8

hint:
9=3*3, so 9 is a perfect square
289= 17*17, so 289 is a perfect square

Answer 9

Oh ok so 1 and 3 are irrational

Answer 10

@Michele_Laino

Answer 11

that's right!

Answer 12

Thx! c:

Answer 13

thanks! :)