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Mathematics 9 Online
OpenStudy (anonymous):

A rectangular cardboard poster is to have 150 in^2 for printed matter. It is to have a 3 in margin at the top and bottom and a 2-in margin on each side. Find the dimensions of the poster so that the amount of cardboard used is minimized. 1. 11 in. × 34 in. 2. None of these 3. 21 in. × 14 in. 4. 21 in. × 10 in. 5. 12.5 in. × 24 in.

OpenStudy (mathstudent55):

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