With these questions about the motorcycle and the drone, it says that the distance between the motorcycle and drone is decreasing. If the distance is decreasing, then the rate of change of this distance would be negative, right? However, it seems that when I solve these problems if I put a negative sign in front of this rate of change (in this case 245 km/hr), it gives me the wrong answer. I have to input the 245 as a positive number. But that seems wrong, since it's a negative rate of change. Could someone explain? Thank you!
A drone is flying at 101 kilometers per hour at a constant altitude of 1 km above a straight road. The drone pilot uses radar to determine that an oncoming motorcycle is at a distance of exactly 2 kilometers from the drone, and that this distance is decreasing at 245 kilometers per hour.
Find the speed of the motorcycle (in kilometers per hour).