which of the following is a rational number square root of 15, square root of 16, square root of 21, square root of 22.

16

Step-by-step explanation:

16s square root is 4 and 4 can be written as a fraction

Therefore, 4 is a rational number

And to the conclusion 16 is the answer

please mark brainliest =}

40 is the final : )

a

step-by-step explanation:

when a number is between two straight lines it means the absolute value.

to find absolute value you need to know how many numbers is that number away from 0.

when finding absolute value the number will always come out positive

so absolute value of -3 is 3

absolute value of 3/2 is 3/2

absolute value of -2 is 2

absolute value of 3.5 is 3.5

absolute value of -1 is 1

now put these numbers in order:

a)   |-1|, |3/2|, |-2|, |-3|, |3.5|