Will Medal and Fan!
Which numbers are rational or irrational below?

1. √9
2. √3
3. 3.14
4. 0.25
5. 5

Question

Will Medal and Fan!
Which numbers are rational or irrational below?

1. √9
   2.  √3
   3. 3.14
   4. 0.25
   5. 5

will.h · Answer

what do you know about rational numbers and or irrationals

kylexchaos · Answer

@Will.H I know it can be written as a decimal.

kylexchaos · Answer

@Will.H I mean, fraction.

will.h · Answer

okay which of these you think are rational?

will.h · Answer

@Kevin can you help him i have to go

kevin · Answer

for an easy -->
irrational is any number which cannot be written as fraction, so usually irrational number is the square root of prime number

rational is a number that is not irrational

kevin · Answer

Do you understand? :)

will.h · Answer

Thanks Kevin

kevin · Answer

You're welcome Will :D

kylexchaos · Answer

I think they're all rational @Kevin @Will.H

kevin · Answer

Why?

kylexchaos · Answer

9 is a natural number and an integer.

will.h · Answer

sqrt9 is equal to 3 how come this one is rational?

kylexchaos · Answer

They are all natural numbers and integers.

kevin · Answer

why √3 is rational?

kylexchaos · Answer

It's an integer

kylexchaos · Answer

It passes both tests on being a rational number.

kylexchaos · Answer

right?

kevin · Answer

it's not an integer. Do you know what is integer?

kylexchaos · Answer

it can be written as a fraction

kevin · Answer

Well, how you write √3 into fraction form?

kylexchaos · Answer

3
_
1

will.h · Answer

when the denominator = 1 that doesn't count a fraction

kylexchaos · Answer

Oh, you're right because it cannot be expressed as a ratio of integers

will.h · Answer

exactly and because it cannot be represented in decimal notation like 2.4354

kevin · Answer

- all of integer is rational number
- any number that we can turn into fraction a/b (with a and b is in integer form) is rational number

1. √9 = 3 (3 is an integer, It should be rational number)
2. √3 (3 is prime number, root of prime number must be irrational)
3.  3.14 = 314/100 ( we can rewrite it into fraction, so it's rational)
4. 5 (5 is an integer, so it's rational)

kylexchaos · Answer

so then I got everything right except √3

kylexchaos · Answer

Thanks for the help !

kevin · Answer

u're welcome :)

will.h · Answer

no sqrt9 is not rational tho

will.h · Answer

number 1 and 2 are irrational the rest are rational