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It equal to 21 or 56
A piece of evidence or information used in the detection of a crime or solving of a mystery.
The only piece of information required to find the area of a circle is the radius of the circle. Once you know the radius of the circle, the area is simply the radius squared multiplied by pi (approximately 3.14).
True
You cannot. You can only work with the remaining observations. Estimating the missing value will not add to the information. You will only APPEAR to have an additional piece of information.