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OpenStudy (anonymous):
The area of a trapezoid is found using the formula 2003-01-03-00-00_files/i0080000.jpg, where 2003-01-03-00-00_files/i0080001.jpg and 2003-01-03-00-00_files/i0080002.jpg are the parallel sides of the trapezoid and h is the height of the trapezoid. What is the area, in square kilometers, of a trapezoid with bases 5 km and 7 km and height 3 km?
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