4. (15 points) A shark swims parallel to a shoreline, stayin…
4. (15 points) A shark swims parallel to a shoreline, staying at a fixed distance of 3 km from the shore. It is swimming at a constant speed of 8 km/h and will soon pass a nearby lighthouse on the shoreline, as shown in the diagram below. How fast is the distance between the shark and the lighthouse shrinking/decreasing when it is exactly 5 km from the lighthouse? (Include units in your final answer.) The distance between the shark and the lighthouse is decreasing at a rate of
Read Details