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Mathematics 21 Online
OpenStudy (anonymous):

The weight of an airplane varies with the cube of the plane's length. The lift generated by an airplane's wings varies with the square of the plane's length. A scale model of a particular design, 0.850 meters in length, weighing 3.50 newtons (N), generates a lift of 28.8 N. The same design built to a production length of 5.13 meters has a lift-to-weight ratio is most closely given by:

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