12. find 120% of 18. show your work.

21.6

Step-by-step explanation:

18 is the 100% of the given number, 120% is 18 + 20% of 18

to find 20% of 18 we multiply 18 by 20 and the divide it by 100

18 × 20 ÷ 100 = 3.6 now add this to 18 and the answer is 21.6

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.