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...Related rates the idea is to compute rate of change one quantity in terms another which we may know more information about suppose want radius a circle with respect time also at area changing will find an equation that relates quantities then differentiate using chain rule so its r take derivative both sides t da dr dt steps solving problems read problem carefully if appropriate draw picture represents situation assign variables and write down what known unknown often used pythagorean theorem trigonometric relationships similar triangles formulas for volume etc use here substitute values resulting solve answer question make sure you being asked ex are blowing bubble gum can blow air into s how fast increasing when inches b increase your effort begin now p length rectangle cm width noon ship km west sailing east h north distance between ships pm kite ft above ground moves horizontally speed angle string horizontal decreasing have been let out water leaking inverted conical tank min same...