The model below presents a kitchen with an island in the center. The homeowner plans to install tile on the part of the floor not covered by the island. Which expression represents the part of the floor to be covered by the tile?

he answer is x=1x3 because x=1 to x=3

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.  

apex says the answer is true