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Fill in the blank: A lens whose diameter is four inches gathers ______ times as much light as a lens whose diameter is one inch.

Fill in the blank: A lens whose diameter is four inches gathers ______ times as much light as a lens whose diameter is one inch.
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Fill in the blank: A lens whose diameter is four inches gathers ______ times as much light as a lens whose diameter is one inch.

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User Bjmc
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the correct answer: 16
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User Freaky
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