Question

Will medal and fan! Thank you♥
1. which number is an irrational number:
a. 0.12
b. 0.1257486...
c. 0.12121212...
d. 0.111111

Answer 1

Irrational numbers can't be written as simple fractions.

Answer 2

Rational numbers are regular decimals, repeating decimals, etc. Because they can all be written as simple fractions.

Answer 3

So what do you think?

Answer 4

c can i get a medal now

Answer 5

An Irrational Number is a real number that cannot be written as a simple fraction.

Irrational means not Rational

Examples:



Rational Numbers

OK. A Rational Number can be written as a Ratio of two integers (ie a simple fraction).

Example: 1.5 is rational, because it can be written as the ratio 3/2

Example: 7 is rational, because it can be written as the ratio 7/1

Example 0.333... (3 repeating) is also rational, because it can be written as the ratio 1/3



Irrational Numbers

But some numbers cannot be written as a ratio of two integers ...

...they are called Irrational Numbers.

It is irrational because it cannot be written as a ratio (or fraction),
not because it is crazy!


Example: π (Pi) is a famous irrational number.

Pi
π = 3.1415926535897932384626433832795 (and more...)

You cannot write down a simple fraction that equals Pi.

The popular approximation of 22/7 = 3.1428571428571... is close but not accurate.

Another clue is that the decimal goes on forever without repeating.

Answer 6

got it

Answer 7

Thank you!

Answer 8

np

Answer 9

I know the answer I did this yesterday the real answer is: B

Answer 10

Thank you daisyrainbowmist♥ I'm already you fan!

Answer 11

lol no problem I will fan you also

Answer 12

@jlowrey03 @daisyrainbowmist Don't give answers.

Answer 13

A is a rational number because it's a regular decimal.
B is not a rational number because it's a continuous decimal that doesn't repeat.
C is a rational number because it's a repeating decimal.
D is a rational number because it's a repeating decimal.