2. Students rent buses and vans for a trip to Disneyland. There were 8 12 buses and 8 vans and 360 students:
a) Write an equation to show the relationship described above.
b) If there are 12 students on every van, how many kids are on each bus?

where's the diagrams?

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.