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5 February, 18:59

What is the length of stack E C with bar on top in the rectangular prism? Round to the nearest tenth of a centimeter. A. 7.5 cm. B. 9.4 cm. C. 12.6 cm. D. 15.3 cm.

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  1. 5 February, 19:16
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    EG = sqrt (8^2 + 5^2) = sqrt (64 + 25) = sqrt (89)

    EC = sqrt ((sqrt (89)) ^2 + 12^2) = sqrt (89 + 144) = sqrt (233) = 15.3 cm.
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