What is the area of a circle with a diameter of 16.2 in.?
Use 3.14 for pi and round your final answer to the nearest hundredth.
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In 2

36x2 + 49y2 = 1,764 the foci are located at: (-√13, 0) and (√13,0) (0, -√13) and (0,√13) (-1, 0) and (1, 0)edit: the answer is (- the square root of 13, 0) and (the square root of 13, 0)