US lists polar bears as threatened.(unknown)Paulson, Amanda
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two measurements with absolute measurement uncertainties given added to one another. The arithmetic, a visual example of the addition with uncertainties (on a scale, a ruler, a thermometer, in counting bears, poker chips, whatever) and show them being added physically. If your illustration ...
“Life is about the people we meet and the experiences we have along the way.” ~ Joanne Clancy “The sea! the sea! the open sea! The blue, the fresh, the ever free!” ~ Bryan W. Procter “The ocean is a mighty harmonist.” ~ William Wordsworth ...