Objects detected by radar are plotted in a coordinate plane where each unit represents 1 mile. The point (0,0) represents the location of a shipyard. A cargo ship is traveling at a constant speed and in a constant direction parallel to the coastline. At 9 a. M. The radar shows the cargo ship at (0,15). At 10 a. M. , the radar shows ship at (16,15). How far is the cargo ship from the shipyard at 4p. M. ?

please explain too. ​