A bridge over the Intracoastal Waterway is a parabolic arch that is 200 ft wide at its base and 50 feet high at the center. A) Determine the model for this parabolic arch. B) Will a boat that is 30 ft tall clear the arch 30 ft from the center? C) What is the maximum height of a boat that would clear the arch at 30 ft from center? D) What is the height limit of a boat, passing underneath, needed to clear the bridge at over 75% of the bridge span?

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