The last option is the correct answer:
2 • 8n • 8n • 8n • 8n
Decomposing (8n)^4 into “8n • 8n • 8n • 8n” reflects the Power-to-Power Rule of exponents, (ab)^m = a^m • b^m.
The exponent, 4, doesn’t apply to 2 because it is outside the parenthesis.
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