Aboat travels north across a river at a velocity of 22 meters /second with respect to the water. the river's velocity is 22
meters /second to the east. what is the resultant velocity of the boat, as measured from the land?

a.242 meters /second northeast
b. 35.5 meters/ second north
c. 221 meters /second northeast
d. 28.7 meters/ second east

Assume that a person skiing high in the mountains at an altitude of h = 15100 ft takes in the same volume of air with each breath as she does while walking at sea level. determine the ratio of the mass of oxygen inhaled for each breath at this high altitude compared to that at sea level. assume that the air composition (i.e. % of air that is oxygen) is the same at sea level as it is at 15100 ft.