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N = 4 × 10^16 (1/2)^30 = 1/2 × 10^16 Atoms decayed = 4 × 10^16 − 1/2 × 10^16 = 3.5 × 10^16

1. N = 4 × 10^16 (1/2)^30 = 1/2 × 10^16
2. Atoms decayed = 4 × 10^16 − 1/2 × 10^16
3. 3.5 × 10^16
4. None of the above

Correct answer: None of the above

Solution

The given calculations are inconsistent and do not follow proper mathematical or physical reasoning. None of the options correctly represent the decay process or its result.

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