simplify the expression so there is only one positive power for each base
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2.7^-3 * 3.8^2 *2.7^4 * 3.8^3
= 2.7^(-3 + 4) * 3.8^(2 + 3)
= 2.7^1 * 3.8^5
= 2.7 * 3.8^5
Answer is C. 2.7 * 3.8^5
the answer is C because if you combine the alike number the expressions get cancelled out