12 has two significant figures. A significant figure is any non-zero digit or any embedded or trailing zero. Leading zeros are not significant.
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The real answer is 33.443 but since 12 is the number with the least significant figures your answer will be 33
there are 2 significant figures in 12 eggs in a carton because it has only 12 eggs it is only tens but if it like 12,000,001 it has 8 significant figures...
For multiplication/division, use the least number of significant figures (ie 6.24 * 2.0 = 12). For addition subtraction, use the least specific number (ie 28.24 - 2.1 = 26.1)
A, B and D.
12+5+9+10=36/4=9 9 is the Mean of 12, 5, 9, and 10 To find the mean of something, add all the figures and then divide by the number of figures.