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A point P is uniformly chosen inside a regular hexagon of side length 3. For each side of the hexagon a line is drawn from P to
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A ball of volume V=8 L is full of air with pressure higher than atmospheric pressure by ?p=2×104 Pa. The total mass of the ball
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G is a circle with chord AB. P is a point outside of G such that PA is tangent to G and ?BPA=90°. If AB=48 and PB=8, what is
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