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Derivative of sin(x/2)? What is the normality of an acid if 21.18 mL were needed to titrate 0.1369 g Na2CO3? What are the coordinates of the vertex of the parabola represented by the equation y= −5x2 + 30x−25 ? Base of a solid is bounded by y=2, y=arcsinx, and x=1. Each cross section perpendicular to the x-axis is a square. What is the volume? Discuss briefly the recruitment process?