Final answer:
To rewrite (78)^(-4) as a fraction with a positive exponent, it becomes 1 / (78⁴), following the rules of exponents where a negative exponent indicates the reciprocal of the base raised to the positive exponent.
So. the correct answer is A.
Step-by-step explanation:
The question asks to rewrite (78)⁻⁴ as a fraction raised to a positive exponent. To do this, it's important to understand that a negative exponent indicates the reciprocal of the base raised to the absolute value of the exponent. Therefore, (78)⁻⁴ is equivalent to 1 / (78⁴), which is option a).
This concept is tied to the rules of exponents, which state that x⁻ⁿ = 1 / xⁿ,
So. the correct answer is A.