Find the distance between the foci of the ellipse (9x^ 2 +16y^ 2 =144 ).

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Problem

Find the distance between the foci of the ellipse 9x2+16y2=1449x^{2}+16y^{2}=144. (a) 474\sqrt{7} (b) 88 (c) 272\sqrt{7} (d) 1010

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