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5 October, 10:10

A radio station has a broadcast area in the shape of a circle with equation x^2+y^2=5 625

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  1. 5 October, 10:30
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    Let us assume that the center of the circle is (0,0)

    (x-h) ² + (y-k) ² = r²

    x² + y² = 5,625

    r² = 5,625

    r = √5,625

    r = 75

    Area of a circle = π * r²

    A = 3.14 * (75mi) ²

    A = 3.14 * 5,625 mi²

    A = 17,662.50 mi²
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