The Martinez family goes out to lunch, and the price of their meal is $45. The sales tax is 6%, and the family intends to leave a 20% tip. How much will their meal cost total, including both tax and tip? (Note: The tip and the tax are both based on the original price of the meal, $45)

d. you cannot tell because there are no values shown.

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.