3 inches cost 7 cents; six inches costs how many cents?

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Multiple Choice

3 inches cost 7 cents; six inches costs how many cents?

Explanation:
The amount paid is directly proportional to the length, so the cost scales with inches. First find the cost per inch: 7 cents for 3 inches means 7/3 cents per inch. For 6 inches, multiply by 6: 6 × (7/3) = 14 cents. Doubling the length from 3 to 6 inches doubles the cost from 7 to 14. The other numbers would correspond to different length changes (tripling, quadrupling, or keeping the same cost despite longer length), which doesn’t fit the given information.

The amount paid is directly proportional to the length, so the cost scales with inches. First find the cost per inch: 7 cents for 3 inches means 7/3 cents per inch. For 6 inches, multiply by 6: 6 × (7/3) = 14 cents. Doubling the length from 3 to 6 inches doubles the cost from 7 to 14. The other numbers would correspond to different length changes (tripling, quadrupling, or keeping the same cost despite longer length), which doesn’t fit the given information.

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