1. A ship leaves port at noon and has a bearing of N 45° E. The ship sails at 15 knots. How many nautical miles north and how many nautical miles east will the ship have traveled by 4:00 P.M?
2. A fishing bobber oscillates in simple harmonic motion because of the waves in a lake. The bobber moves a total of 1.5 inches from its low point to its high point and returns to its high point every 3 seconds. Write an equation that describes the motion of the bobber, where the high point corresponds to the time t = 0.