An item costs $410 before tax, and the sales tax is $20.50 . find the sales tax rate. write your answer as a percentage.

it is 430.50

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.