Question

Which is NOT rational?

(As in rational number)

4 + sqrt(2^2 -1)

1/3

sqrt(6^2 + 13)

9

Answer 1

1/3 I think.

Answer 2

4/5 is a rational number so i do believe that 1/3 is also

Answer 3

@DemolisionWolf

Answer 4

a rational number is a number that, when written in decimal form, either repeats endlessly, OR has a decimal that ends.

4/5 = 0.8, so it is a rational number becuase the decimal ends
1/3 = 0.33333333333333333, is a rational number because it repeats endlessly

make sense now?

Answer 5

but in my lesson for class it said that
2.828427125 was irrational
and -3.141592654.. was irrational also
is it because there are a bunch of different numbers after the decimal point instead of just one?

Answer 6

my lessons definition was
A rational number is any number that can be written as a fraction, or a ratio of two integers.

Answer 7

OOOOOHHHH im sorry i misunderstood everything that you just said.

Answer 8

I know both fractions are rational its just the other two options xD

Answer 9

"but in my lesson for class it said that 2.828427125 was irrational and -3.141592654.. was irrational also is it because there are a bunch of different numbers after the decimal point instead of just one?"

very good, you get it.
an irrational number is when it just has random numbers after it, yep

Answer 10

4+ sqrt(2^2 - 1)

4 - 1 is 3

the square root of 3 is 1.73
1.73 + 4 = 5.73

so that is rational?

Answer 11

is the sqrt(3) = 1.73? or does it actully continue randomlyh?

Answer 12

oh, its a bunch of random numbers xD

Answer 13

very good.
a bunch of random numbers means Irrational

Answer 14

then the other one would be 49 which would equal 7 and yeah that ones irrational

Answer 15

Alright I got it now, thanks xD

Answer 16

^_^