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What is the value of 4^3?

  1. 40

  2. 64

  3. 81

  4. 16

The correct answer is: 81

The value of 4^3 can be found by multiplying 4 three times, giving us 4x4x4, or 64. Option A, 40, is incorrect because it is the result of 4^2, which is 4x4 or 16. Option B, 64, is incorrect because it is the result of 4^2, not 4^3. Option D, 16, is incorrect because it is the result of 4^1, not 4^3. Therefore, the correct answer is option C, 81.