Question

What is an integer?

Answer 1

5.85
63.4
\[\sqrt{21}\]
\[\sqrt{36}\]

Answer 2

An integer is a number that can be written without a fractional or decimal component. For example: 2, -6, 7, 14... they're all integers. The first two you listed are not integers.

Answer 3

Ok i understand it this an integer? \[\sqrt{21}\]

Answer 4

i mean the answer...

Answer 5

the square root of 36 is 6, that is also an integer.
the square root of 21 is 4.58257569 so no, it is not

Answer 6

ahh ok.
thanks

Answer 7

welcome (:

Answer 8

Also can
\[\sqrt{2}\]
be a rational number?

Answer 9

no, because 2 cannot be written as a simple fraction

Answer 10

what about \[\sqrt{9}\]

Answer 11

the absolute value of 9 is 3. Can 3 be written as a simple fraction?

Answer 12

yeah 1/3

Answer 13

Then it is a rational number. :)

Answer 14

thank you :D

Answer 15

You're welcome :D