A lighthouse stands 550 m off a straight shore and the focused beam of its light revolves five times each minute. As shown in the figure, P is the point on shore closest to the lighthouse and Q is a point on the shore 300 m from P. What is the speed of Lighthouse . the beam along the shore when it strikes the point Q? 550 m TOP - 300 m Let x be the distance along the shore from point P to the beam and let 0 be the angle through which the light revolves. Write an equation that relates x and 0. 0 Find the related rates equation. dx at =() at When the beam strikes the point Q, its speed along the shore is about V (Do not round until the final answer. Then round to the nearest integer as needed.)