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A dinghy is pulled toward a dock by a rope from the bow through a ring...

A dinghy is pulled toward a dock by a rope from the bow through a ring on the dock 7 ft above the bow. The rope is hauled in at the rate of 1 ​ft/sec. Complete parts​ (a) and​ (b).

a. How fast is the boat approaching the dock when 25 ft of rope are​ out?

b. At what rate is the angle theta changing at this​ instant?

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