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^{2}+ 2x between one headland at x = 0 and another at x = 1km, where (f) is also measured in km. at low tide, the edge of the sea just reaches each headland, following a straight line between them. calculate in km

^{2}the area of the bay uncovered by water at low tide?

does anyone get this ??

because i do not, whatsoever, i would try, but dont know where to start either let alone answer it :(