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Mathematics 17 Online
OpenStudy (milo123):

MEDAL http://prnt.sc/cixpqc

OpenStudy (milo123):

@Nnesha

OpenStudy (milo123):

@raffle_snaffle

OpenStudy (milo123):

@Jaynator495

OpenStudy (wckeller):

Let me ask this, do you know what an irrational number is?

OpenStudy (milo123):

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

OpenStudy (milo123):

can't be written as a fraction ..... is it c?

OpenStudy (wckeller):

Good! So for question 1, we need to use a calculator and take the square root of 13 to find the decimal approximation. sqrt(13)=3.605 So yes, for question 1 the correct answer would be C

OpenStudy (milo123):

and the second is a?

OpenStudy (wckeller):

Yes, the correct answer is A. You can move the decimal place to the right one and make it become 9.5 *10^7

OpenStudy (milo123):

and the third http://prnt.sc/cixrtc

OpenStudy (milo123):

is c too?

OpenStudy (wckeller):

C is a rational number because it is a fraction (a ratio)

OpenStudy (wckeller):

So the square root of 9 is 3 correct?

OpenStudy (milo123):

are you sure? is it b?

OpenStudy (wckeller):

Which makes sqrt(9) a rational number as well.

OpenStudy (wckeller):

The only answer that is not rational is B. Sqrt(5) is not a perfect square, and only has a decimal approximation.

OpenStudy (wckeller):

So the final answer for Q3 is B.

OpenStudy (milo123):

OK THANKS

OpenStudy (milo123):

idk why that was caps

OpenStudy (wckeller):

Haha, no problem. Glad I could help.

OpenStudy (milo123):

wait so its the square root of 5? thats b http://prnt.sc/cixrtc

OpenStudy (wckeller):

Yes.

OpenStudy (milo123):

ok

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