Earth Has a Radius of About 6400 Km, the Sun

Earth has a radius of about 6400 km, the Sun has a radius of about 7.0 × 10⁵ km, and a rubber ball has a radius of 6.4 cm. If you were to construct a scale model of the solar system using the rubber ball to represent Earth, what is the radius of a ball needed to represent the Sun in your model?

A) 7.0 × 10⁵ cm
B) 7.0 cm
C) 700 cm
D) 70 cm
E) 7000 cm

Correct Answer:

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