Question

Which number is irrational? A. 0.656656665... B. 0.78 C. 2.35 D. 꼭

Answer 1

`0.78`

can be expressed as a fraction:

`(39)/(50)`

Therefore, it is a rational number

`2.35`

Can be expressed as a fraction:

`(47)/(20)`

Therefore, it is a rational number

However:

`0.656656665`

can't be expressed as a fraction, therefore, it is an irrational number