A Windlass Is Used to Tow a Boat to a Dock

Multiple Choice

A windlass is used to tow a boat to a dock. The figure shows a situation in which there are $y$ feet of rope extended to the boat $x + b$ feet away from the dock. How far is the boat from the dock if $y = 75$ feet and $b = 54$ feet? Round to the nearest tenth of a foot.

A) 29.4 feet
B) 7.8 feet
C) 72.6 feet
D) 18.6 feet
E) 61.8 feet