How fast is oa changing, Points A and B move along the x-

How fast is oa changing

Reference no: EM13177761

Points A and B move along the x- and y-axes, respectively, in such a way that the perpendicular distance r from the origin to AB remains constant. How fast is OA changing, and is it increasing or decreasing, when OB=2r and B is moving toward O at the rate of 0.3r units/sec?

Reference no: EM13177761

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