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A geologist estimates that the volume of a slab of granite is greater than cubic feet but less than cubic feet. The geologist also estimates that the slab of granite weighs pounds per cubic foot of volume. Which inequality represents this situation, where represents the estimated total weight, in pounds, of the slab of granite?
Explanation
Choice C is correct. It's given that the estimated volume of the slab of granite is greater than cubic feet but less than cubic feet. It's also given that the estimated weight per cubic foot of volume of that slab is pounds. The estimated total weight of the slab of granite, in pounds, can be calculated by multiplying the estimated volume by the estimated weight per cubic foot. Therefore, if the estimated volume of the slab of granite is cubic feet, its estimated total weight is pounds, and if the estimated volume of the slab of granite is cubic feet, its estimated total weight is pounds. Since the estimated volume of the slab of granite is greater than cubic feet but less than cubic feet, the estimated total weight , in pounds, must be greater than pounds and less than pounds. This situation can be represented by the inequality .
Choice A is incorrect and may result from conceptual or calculation errors.
Choice B is incorrect and may result from conceptual or calculation errors.
Choice D is incorrect and may result from conceptual or calculation errors.