This is why you rarely see bats hanging in an attic in the winter-it is just too cold for survival. People who have a colony of bats in their home often describe a scratching sound or occasionally get a bat inside their home. We believe that the bats move around and adjust their position based upon the temperature.
The mean of a set of numbers is their average. You find the average of a set of numbers by adding them up and dividing by the number of numbers you have. So, the mean of 3,4,6,9, and 3 is: 3 + 4 + 6 + 9 + 3 25 ----------------- = -- = 5 5 5.
The usual or standard state or manner of something. This word has a somewhat more technical meaning in mathematics. Two formulas such as 9 + x and x + 9 are said to be equivalent because they mean the same thing, but the second one is in canonical form because it is written in the usual way, with the highest power of x first.