



 
Hi, I drew a diagram of the positions of the boats after 3 hours (not to scale). D is the dock, A is the position of the slower boat and B is the position of the faster boat. The slower boat travels at 10 mph so what is the distance from D to A? What is the distance from D to B? You want the distance from A to B. Since angle BDA is a right angle Pythagoras can help. Penny  


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