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Mathematics 18 Online
OpenStudy (anonymous):

Which number is irrational?

OpenStudy (anonymous):

A. 0.46

OpenStudy (anonymous):

B\[ \frac{ \sqrt{100} }{ 3 }\]

OpenStudy (anonymous):

c \[\sqrt{8}\]

OpenStudy (anonymous):

D 0.8 with a little line over it

OpenStudy (alekos):

An irrational number is one which cannot be expressed as a fraction

OpenStudy (anonymous):

ok.. but im still confused

OpenStudy (alekos):

Can .46 be expressed as a fraction?

OpenStudy (anonymous):

idk :/

OpenStudy (alekos):

.46 = 46/100

OpenStudy (anonymous):

so yes

OpenStudy (alekos):

What about sqrt100/3 ?

OpenStudy (anonymous):

I think so because it is in fraction form...

OpenStudy (alekos):

That's right its 10/3

OpenStudy (alekos):

What about .8 recurring?

OpenStudy (anonymous):

yes... I think so

OpenStudy (anonymous):

Does it make this C @alekos??

OpenStudy (anonymous):

@iGreen can you help

OpenStudy (anonymous):

@ganeshie8

OpenStudy (anonymous):

@ParthKohli

OpenStudy (alekos):

.8 recurring is 8/9 which is also rational. Just put that into your calculator.

OpenStudy (alekos):

Sqrt8 = 2 x sqrt2 can sqrt2 be expressed as a fraction? no.

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