5. Two cars are approaching an intersection at right angles, one travelling east (AllCC) (Bob). If Alice is travelling 45 km/h and Bob is travelling 35 km/h, then how fast are they approaching each other (how fast is the distance between them changing) when they are both 0.25 km from the intersection? Include appropriate units and leave your final answer in exact form or rounded to the nearest hundredth (two decimal places). LAlice. Bob