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Suppose a ship is sailing at a rate of 20 kmfh parellel to a straight shoreline

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Suppose a ship is sailing at a rate of 20 kmfh parellel to a straight shoreline. The ship is 3 km from shore when it passes a lighthouse at 1 pm. C] a] Let h be the distance between the lighthouse and the ship. Let d be the distance from the ship has travelled since 1 pm. Express n as a function of d. Please include a diagram. h] Express d as a function of t, the time elapsed since 1 pm. [3 c) Find had. What does this function represent?