When you multiply a number times itself you get the square.
2x2=4
3x3=9
4x4=16
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A square unit is a unit when squared equals a perfect square number. 5 is a square number, five times five is 25. Divid or square root 25 and you get 5. now technicaly every number is a square number but it is generally considered only whole numbers.
To find the unit rate, divide the number of people by the area in square miles. In this case, 800 people divided by 20 square miles equals 40 people per square mile. Therefore, the unit rate is 40 people per square mile.
Population density, the definition is the average number of people in one unit, but unit is commonly one square mile.
The imaginary unit number is the square root of -1 and is denoted by i
It is the number that youve hat to square to get to that number.