Geography

Geography, 23.07.2019 11:20, kendelllh

Which of the following materials would be the least efficient in soundproofing a room: clay tile, plaster, or perforated acoustic ceiling material? be sure to use your knowledge of the coefficient of absorption in your explanation.

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Each pail of plaster covers 90 square feet of ceiling. what is the least number of pails of plaster you would need to buy to cover the ceiling of a room with walls 14 feet long?

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