- What is 9/20 in decimal form?

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What is the partial pressure of N2 in a mixture of N2 and O2 having a total pressure of 1075 torr if the partial pressure of O2 is 720 torr? Differentiate(t) = (cos^3 t+ 3cost +7)^9? Find integers x and y such that 57x+79y=17, and 400 Could a black hole exist within the event horizon of a bigger black hole? Why erythrocytes have a light section in the middle?