To determine which expression is equivalent to 185, let's evaluate each option step by step:
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85: This is simply the number 85, which is not equal to 185.
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8^5: This evaluates to 32768, which is not equal to 185.
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8^(-5): This is equal to \( \frac{1}{8^5} \), which is a very small number (approximately 0.000031), not equal to 185.
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815: This presumes formatting as part of the question. As written, it just reads as 815, which is not equal to 185.
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8 Start Fraction 1 over 5 End Fraction: This could be interpreted as \( 8 \times \frac{1}{5} = \frac{8}{5} = 1.6\), which is not equal to 185.
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5^(-8): This is equal to \( \frac{1}{5^8} \), which is also a very small number (approximately 0.00000032), not equal to 185.
Given the evaluations, none of the options provided are equivalent to 185. Thus, the answer is that none of the given choices are correct if the goal is to find an expression equivalent to 185.