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L ii
i i
i i
i i
i i A
i i
i i
i i
i i
i i 4000 miles
i i
i i
E ii

right triangle have to find side EL.
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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