A motorboat, which has a speed of 5.0 meters per second in still water, is headed east as it
crosses a river flowing south at 3.3 meters per second. What is the magnitude of the boat’s
resultant velocity with respect to the starting point?
A. 
3.3m/s
B. 
5m/s
C. 
6 m/s
D. 
8.3m/s
3.
Vector quantities contain magnitude and ...............?