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Why is sulphur an element? Using Green's Theorem, calculate the area of the indicated region.
The area bounded above by y=5x and below by y=3x^2? If russia is the biggest country in the world why is its population 143 million? Find the volume of the solid generated by rotating about the y-axis the region bounded by x=y^2 and x=2y. State the definite integral? Chemistry help- why is a buffered solution containing NH3 and NH4Cl basic even though NH4+ is acidic?