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The point (4,4) lies on a circle whose center is at (0,1). How do I write the standard form of the equation of this circle? What is the pH of a solution resulting from 2.50 mL of 0.075 M HCl being added to 35.00 mL of pure water? What is the operational difference between using HCFC and HFC? Let say we have 3380 W power supply that has 12V DC and 281.5 A output.Can we run a 12VDC motor 2A that need 24W power? How do I solve f(x+3) when f(x) = 4-x^2?