A cylindrical vessel without lid is 4 cm in radius and 10 cm in height. If the vessel is to be coated with 0.4 cm of silver, use differentials to approximate the amount of silver to be used. Let z be a differentiable function of r and y related by the following equation: x+z Əz Find at the point (3,0,0). ду = =(√y + cosh(z))².

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