Im taking physics now and im trying to study for an exam but some of the sample questions in my textbook do not give a an explanation of how to solve them...it's ridiculous. Do they think it will just come to me?! Question:Suppose the river is moving east at 5.00km/h and the boat is traveling at 45 degrees south of east with respect to earth. Find (a) the speed of the boat with respect to earth and (b) the speed of the boat with respect to the river if the boat's heading in the water is 60.0 degrees south of east. there was a sample problem earlier with the same boat and it said that the speed of the boat was 10.0km/h. Im pretty sure they assumed we knew that already and is is supposed to be used. But other than that im pretty confused. Please HELP!!!