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I need help with Calculus 3! I have to use green's theorem to solve this but I have no idea how to. Can someone please help me? At 25 °C, what is the hydroxide ion concentration, [OH–], in an aqueous solution with a hydrogen ion concentration of [H ] = 1.3 × 10–4 M? A. Given dy/dt=−4y and y(2)=400. Find y(7)
B. radium has a half-life of 1599 years. What percent of a given amount remains after 500 years? How do you evaluate tan 7pi/4 without using a calculator? I m not sure how to do this math problem please awnser this if you can, thanks!? How do you find the gallons per minute for a fire pump, given its data plate?