Which of the following numbers is irrational?

-0.3

the square root of 3

1/3

__
0.13

H̲̅ᴇ̲̅ʏ̲̅!̲̅ L̲̅ᴇ̲̅ᴛ̲̅'̲̅s̲̅ ɢ̲̅ᴇ̲̅ᴛ̲̅ ʜ̲̅ᴇ̲̅ʟ̲̅ᴘ̲̅ɪ̲̅ɴ̲̅ɢ̲̅.̲̅

To do this, we're going to follow the good old trick of the process of elimination. A number can't be irrational if it doesn't end/doesn't repeat.

a. -0.3 is rational because it ends.
b.  is irrrational because it results to about 1.732, then it keeps going on without repeating.
c. 1/3 is rational because it repeats.
d. 0.13 (repeating) is rational becuase it repeats.

The answer is b.

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Maybe the answer is 20mm. all i really did was just multiply, which is obvious.