



 
Hi Tracey, In my diagram $T$ is the top of the dock, $D$ is the point where the dock meets the water and $B$ is the boat. The distance from $T$ to $D$ is 16 feet and the distance from $D$ to $B$ is 17 feet and the distance from $T$ to $B$ is the length of the rope. The triangle $TDB$ is a right triangle. Pythagoras can tell you the length of the rope. Penny  


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