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Samantha is painting a box to use as a prop in her cheer routine if the box is 9 inches long 20 inches wide and 12 inches tall what is the surface area of the box to be painted

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MrRamon
1056 Square inches.
the formula for surface area of a rectangular prism is 2lw+2lh+2wh = SA 
2(9*20)+2(9*12)+2(20*12)=1056 square inches