15. [0/2 Points] DETAILS PREVIOUS ANSWERS OSUNIPHYS1 4.5.P.076. A small plane flies at 230 km/h in still air. If the wind blows directly out of the west at 52 km/h, solve the following. (a) In what direction must the pilot head her plane to move directly north across land? (Enter your answer in degrees west of north.) 76.93 x . west of north (b) How long (in h) does it take her to reach a point 440 km directly north of her starting point? Additional Materials Reading 16. [0/3 Points] DETAILS PREVIOUS ANSWERS OSUNIPHYS1 4.5.P.078. A river is moving east at 6 m/s. A boat starts from the dock heading 270 north of west at 8 m/s. If the river is 1,700 m wide, answer the following (a) What is the velocity of the boat with respect to Earth? (Enter the magnitude in m/s and the direction in degrees west of north.) magnitude 10 x m/s direction . west of north (b) How long (in min) does it take the boat to cross the river? 14 x min Additional Materials Reading