a lighthouse is 10 miles northwest of a dock. a ship leaves the dock at 9 am and streams west at 12 miles per hour. At what time will it be 8 miles from the lighthouse?

use law of cosines

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- Aug 26th 2010, 05:44 AM #1

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- Aug 26th 2010, 04:03 PM #2

- Aug 27th 2010, 01:29 AM #3