Here are solutions to some homework problems from your book
http://h1.ripway.com/DrCherdack/Solutions%20to%20Chapter%203%20Se.doc
Also problem 24 is just adding vectors: the wind has both east and north components which must be added to teh plane's 300 m/s . My recollection is final values are 387m/s east 50 m/s north.
Use Pythagoras and inverse tan to find magnitude and direction
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