One.
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The answer depends on the accuracy ot your "eighty percent"!269 * 0.8000 = 215.2 ( Four significant figures )If the "80 percent" is accurate to three significant figures (should have been written 80.0%): 215If the "80 percent" is only accurate to two significant figures: 220or if the "80 percent" is only accurate to one significant figure: 200
How many significant figures are in 20.8
3 significant figures.
4 significant figures.
3 significant figures.