4. Two ships leave a port at the same time, ship A sails 30 mph in the direction of 1209, while ship B sails 45 mph in the direction of 2209. After 4.5 hours, how far are the ships? Note: write your answer as a decimal rounded to three digits after the decimal point. O B 5. (a) Find the magnitude |wll of the vector w = PQ, where P = (2, -1) and Q = (-4, -9). [b) Find the (vector) direction w of w.6. Let u = 81 + j, v = -21 - 6/,w = i - 3j. Find v - (u - w). Write answer in vector form of i and / combination. 7. Use the pair of vectors v = (3, 2) and w = (-2, 1) to find the following quantities (a) v . w (b) projw v 8. Let D = (-2,3), w = (5, -2). Find the angle between the given vectors, to the nearest tenth of a degree, using a calculator