Miguel is driving his motorboat across a river. The speed of the boat in still water is 13 mi/h. The river flows directly south at 5 mi/h. If Miguel heads directly west, what are the boat's resultant speed and direction? (Not drawn to scale.)
A.) 13.9 mi/h; 21 degrease north of west
B.) 21 mi/h; 13.9 degrease north of west
C.) 13.9 mi/h; 21 degrease south of west
D.) 21 mi/h; 13.9 degrease south of west

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