Luigi consults his plumbing books and finds the table of metal densities shown below. With that, Luigi thinks he has enough to say with a good degree of certainty that the company did not, in fact, use copper
piping

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the answer is a. co2, this would be colder than the : )

explanation:

qualitative observation deals with data that can be observed with our senses: sight, smell, touch, taste, and hearing. they do not involve measurements or numbers. for instance, colors, shapes, and textures of objects are all qualitative observations.