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(4) Two boats are moving with constant speed toward a marker, boat A sailing from the south at 8 mph and boat B approaching
(4) Two boats are moving with constant speed toward a marker, boat A sailing from the south at 8 mph and boat B approaching from the east. When equidistant from the marker the boats are 42 miles apart and the distance between them is decreasing by 72 mph. How fast is boat B going? Answer: mph.
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Elementary Linear Algebra with Applications
Authors: Bernard Kolman, David Hill
9th edition
132296543, 978-0132296540
