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    Circles and Coordinates : Distance from the Center

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    I have solved this question and I would like to know if I am correct.
    " A pizza shop delivers to all customers within a circle determined by the equation
    X squared + Y squared = 400, If the pizza shop is at coordinates (0,0), would they delvier to someone who lives at coordinates (16,-11)
    x + y = 20
    Therefore the radius of the circle is 20 units.

    d=square root (16-0)squared + (-11-0) squared
    = 16 squared + -11 squared
    = 256 + 121
    = square root of 377
    = 19.4 units

    Therefore the person lives within the radius of the circle.

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    https://brainmass.com/math/geometry-and-topology/circles-coordinates-distance-center-44397

    Solution Preview

    Yes, you did it correctly. Assume that the pizza shop is at coordinates (0,0), someone who ...

    Solution Summary

    Distance from the center of a circle is investigated.

    $2.49

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