Answer:

Step-by-step explanation:
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Please give me Brainlest!
Answer:
Light, Volume
Step-by-step explanation:
The volume of sound; the loudness or softness of a musical passage.
Surface area = 2(ab+bc+ac)
a=6 ft, b=12 ft, c=4.5 ft
Surface area = 2(6 * 12 + 12 * 4.5 + 4.5 * 6) =
2(72 + 54 + 27) =
2 * 153 =
306 ft²