Evaluate the error in the area of a piece of cloth if its length is 4.8 Plus or minus 0.3 metres and its width 6.6 plus or minus 0.2 metres

Biased means unfair but that's all ik

  the answer is don't know.

Sounds propagates through some kind of medium. usually it's air, but it goes just as well through solid objects like walls, windows etc. a soundwave will compress the (air)molecules in front of it, and if this increased density wave hits your ears, you register it as sound. solid objects like walls are a lot denser than air, this means that they will damp a wave, but also carry it easier.

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