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Mathematics 23 Online
OpenStudy (anonymous):

A rectangular prism has a surface area of 112 square inches. If it is 2 inches long and 8 inches wide, what is its height? 4 inches 6 inches 8 inches 10 inches

OpenStudy (noseboy908):

because the formula for the area of a rec. prism is area=length x width x height, we can plug in 112=2x8xh, which equals 112=16h, 112/16=7. Therefore, the height has to be 7inches according to the numbers you gave

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