I need help with geometry! has to do w/triangles and angle of depression?

here's the word problem.. Two hills are 2 miles apart. The elevation of the taller hill is 2707 ft. The angle of depression from the top of the taller hill to the top of the shorter hill is 7 degrees. Find the elevation of the shorter hill to the nearest foot. (1 mile = 5280) i have the final tommorow,... show more here's the word problem..

Two hills are 2 miles apart. The elevation of the taller hill is 2707 ft. The angle of depression from the top of the taller hill to the top of the shorter hill is 7 degrees. Find the elevation of the shorter hill to the nearest foot. (1 mile = 5280)

i have the final tommorow, so could you tell me how you got the answer, i really need to understand how to do this!!
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