Final answer:
Cannot determine the value of BC from AC equaling 26 without additional context or information about their relationship.
Step-by-step explanation:
The student is asking to find the value of BC, given that AC equals 26, and to round the answer to the nearest tenth. However, without a specific mathematical context or additional information regarding the relationship between BC and AC, it's not possible to determine the value of BC. In mathematics, especially in geometry, the relationship between two line segments (like AC and BC) could be established through various contexts such as triangles, polygons, or coordinate systems. For instance, if AC and BC are sides of a triangle, we would need more information such as angles or other sides to use trigonometric functions or the Pythagorean theorem to find BC.
If this was extracted from an algebraic or geometric exercise, additional context is needed to solve the problem. As presented, the question is incomplete, thus, it's not possible to provide a precise answer to find BC from AC being 26. If the student can provide more details or clarify the typo, further assistance can be given.