Final answer:
We cannot determine an equivalent expression for 40r^2/2918 without additional context or information, which is not provided in this question.
Step-by-step explanation:
The question seeks to find an equivalent expression for the fraction 40r^2/2918, assuming that r is not equal to zero (r ≠ 0). However, without additional information or a specific relationship between r and x, we are unable to directly simplify or modify the given fraction to match any of the provided answer options (A, B, C, or D). Therefore, we cannot affirm that any of the provided answers are equivalent to the given expression. Instead, we simplify the fraction by dividing both the numerator and the denominator by their greatest common divisor, if possible. If no such divisor exists other than 1, then the fraction is already in its simplest form and cannot be further simplified.