The equation cap d is equal to 13 over cap v shows that the density of a particular substance equals a mass of 13 grams divided by the volume of the substance. What happens to the density as the volume approaches 0 ?

The density is d = 13/v. As the volume v gets closer to 0 while remaining positive, dividing 13 by a smaller and smaller number makes the density grow without bound. Therefore, the density approaches infinity, which is choice A.

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