E approximates the shape of the Eiffel Tower. Its output is the height in meters of the tower x meters from its center, as shown in the graph. (A "negative" distance is interpreted to mean a distance measured from the center to the left side of the tower.)

answer: -0.5 would be the most likley outcome

step-by-step explanation:

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.