A clock is constructed using a regular polygon with 60 sides. The polygon rotates each minute, making one full revolution each hour. How much has the polygon rotated after 7 minutes?

One full revolution is 360 degrees, and it takes 60 minutes. So the polygon rotates 360 ÷ 60 = 6 degrees per minute. After 7 minutes, it has rotated 7 × 6 = 42 degrees, which is choice D.

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