Find the standard deviation of the following quiz scores:
9, 2,5, 4, 12,7

it would be a on edgenuit y

the diagram below is your final answer

c-   36

taxicab circle radius 9 has 4(9) = 36 points

answer: 4  

the square root of 16 is 4. it is a very simple mathematic concept. a square root when a number multiplied by itself will result in a number. here, the number 16 comes when 4 is multiplied by 4. hence the square root of 16 is 4. you can always figure out a square root by the inverse operation of squaring.