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In a circle of radius 180 cm, and arc 276 cm long subtends an angle of how many radians? How many degrees? Find the slope of the tangent line to the curve y = x/(1-x) at the point (.5,1). Find the equation of that tangent line.? Why does the cell surface membrane not provide a barrier to the entry of hydrophobic molecules int the cell? Calculate the mass of butane needed to produce 88.2 g of carbon dioxide.? What is ETOH in relation to blood test results?