Nora buys two packs of scented candles. The first pack has 4 candles and the second pack has 8 candles. She gives $100 to the store clerk. She gets $4 back. How much did each candle cost ?

a

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.