The Earth Is To A Soccer Ball, As The Moon Is To What?

Algebra Level 1

Beckham wants to build a model of the Solar system. If he decided that the earth would be represented by a regulation sized soccer ball (roughly spherical and approximately 11 cm radius), which of the following would be the best representation of the moon?

Note: the actual radius of the earth and moon are approximately 6368 km and 1738 km, respectively.

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