According to the calculations made, the correct option is Tank B.
Given that Jack already has one cubic foot (1,728 cubic inches) of soil and 576 cubic inches of small rocks to use, and he has to choose a tank, the following calculations must be performed to determine which of the tanks to choose:
- Tank A: 18 inches long, 15 inches wide, 15 inches tall
- 18 x 15 x 15 = X = 4,050
- Tank B: 24 inches long, 12 inches wide, 12 inches tall
- 24 x 12 x 12 = X = 3,456
- Tank C: 21 inches long, 18 inches wide, 10 inches tall
- 21 x 18 x 10 = X = 3,780
- 1,728 + 576 = 2,304
Therefore, since Jack has 2,304 cubic inches of materials, and Tank B (which is the smallest) has a capacity of 3,456 cubic inches, that is the correct choice.
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