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amandajerrypop
The first one is 125cm^3 since volume is a^3, where a is the side length. The second one is the third option of 20 x 1,000 + 6 x 100 + 7.

Answers:

  1. A) 125 cm^3
  2. C) 20*1000 + 6*100 + 7

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Explanations:

  1. The cube has all sides the same length (even if the diagram may not look like it). The volume is V = length*width*height = 5*5*5 = 125 cubic cm. The answer is choice A.
  2. The number is 20,607. The "20 thousand" portion can be written into 20*1000. Effectively, we have 20 copies of "1000" being added, so we can shorthand that into multiplication.  The same idea applies to 6*100 which represents 600. Overall we can say 20,607 = 20*1000+6*100+7. The answer is choice C.

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