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What is the average density of municipal solid waste ? How it can be estimated ? What is cos^2(2x)-sin(2x)? An object is traveling around a circle with a radius of 4 meters. If in 30 seconds the object travels 7 meters, what is its angular speed? Can you please solve qsn no. 52? If it turned out Moon is full of life and covered with cities, what would be the implications?