Posted by **Taylor** on Thursday, October 27, 2011 at 6:08pm.

Since its construction in 1821, Marblehead Lighthouse has stood at

the entrance to Sandusky Bay, guiding sailors along Lake Erie’s rocky

shores. The 65-foot tower is one of Ohio’s best-known landmarks and

the oldest continuously operating lighthouse on the Great Lakes.

1. The range of a lighthouse is the maximum distance at which its

light is visible. In the figure, point A is the farthest point from

which it is possible to see the light at the top of the lighthouse L.

The distance along Earth s is the range. Assuming that the radius

of Earth is 4000 miles, find the range of Marblehead Lighthouse.

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