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# At noon, ship A was 15 nautical miles due north of ship B. Ship A was sailing south at 15 knots ...

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At noon, ship A was 15 nautical miles due north of ship B. Ship A was sailing south at 15 knots (nautical miles per hour; a nautical mile is 2000 yards) and continued to do so all day. Ship B was sailing east at and continued to do so all day. The visibility was 5 nautical miles. Did the ships ever sight each other?

▸ No. The closest they ever got to each other was 8.7 nautical miles.

▸ Yes. They were within 3 nautical miles of each other.

▸ Yes. They were within 4 nautical miles of each other.

▸ No. The closest they ever got to each other was 7.7 nautical miles.
Textbook

## Calculus: Early Transcendentals

Edition: 3rd
Authors:
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amberdouglasamberdouglas
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 Good timing, thanks!