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OpenStudy (anonymous):
the surface of a rectangular prism is 100 in squared and its lateral area is 70 in squared. What is the area of a base of the prism?
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Directrix (directrix):
Surface Area = Lateral Area + 2 times the Area of the Base (there are two congruent bases) 100 - 70 = 2B 30 = B B = 15 square inches
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