- Is this a gravel sidewalk? In house?

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If a and b are roots of equation x^2 +x -12 =0 such that a>b then equation whose roots are 2a and 3b is ?Please!? An object weighing 89.7g is placed in a graduated cylinder displacing the volume from 50.0mL to 60.5mL what is its density in g/cm3? Two review questions and an explanation would really help too on how you got the answer? What is the nuclear decay equation for Carbon-14? #Chemistry? Find the sum of cos^2 x + cos^2 (x+1°) + cos^2 (x+2°) + ... + cos^2 (x+179°).?