8. bob nuns a phone charging station at a local mall. he charges $1.75 to charge a phone and it costs him so so to
charge a phone and $20 a day for other expenses. write an equation that can be used to determine the number
of phones bob needs to charge in order to break even

56 44 2 4

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.