• Choice C
    15. The straight-line distance, in miles, from Marville to Bright City must be:

    Distance between two points P(x1, y1) and Q(x2, y2) is given by:

    $$d(P,Q) = \sqrt{(x_{2}-x_{1})^2+(y_{2}-y_{1})^2}$$

    Distance of a point P(x, y) from the origin is given by:

    $$d(0,P) = \sqrt{x^2+y^2}$$


    $$d(0,Bright\ City) = \sqrt{300^2+160^2}= 340$$

    which is between 300 and 390.

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