- How can calculate concentration of unknown lower and outer scale of calibration curve?

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Solve each of the following 1. 3x exponent of 2+6x+3=0 2. 2x exponent of 2 = 10x? Why does urine cloud when refridgerated? Air contains nitrogen and oxygen in the ratio 4 is to 1 the average molecular weight of Air is? What is a perpendicular line? What happens when the intracellular urea concentrations becomes more inside a cell?