Posted by **Anonymous** on Sunday, October 31, 2010 at 8:39pm.

At noon, ship A is 20 nautical miles due west of ship B. Ship A is sailing west at 22 knots and ship B is sailing north at 18 knots. How fast (in knots) is the distance between the ships changing at 4 PM? (Note: 1 knot is a speed of 1 nautical mile per hour.)

- Calculus -
**QUESTION 3 A boat sails 30 miles to the east from**, Wednesday, November 21, 2012 at 9:15am
QUESTION 3

A boat sails 30 miles to the east from a point P, then it changes direction and sails to the south. If this boat is sailing at a constant speed of 10 miles/hr, at what rate is its distance from the point P increasing

a) 2 hours after it leaves the point P

b) 7 hours after it leaves the point P

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