Final answer:
The term 'read back' does not refer to a specific mathematical equation but rather a communication procedure to confirm accuracy. There is no standard 'read back' equation involving calibration and verification in mathematics or related fields. The listed options are not recognized as a 'read back' equation in standard mathematical or technical practices.
Step-by-step explanation:
Clarification on the 'Read Back' Equation There seems to be some confusion, as the term 'read back' typically refers to a communication procedure rather than a mathematical equation. In contexts such as aviation or technical support, 'read back' means repeating instructions or information back to the sender to confirm accuracy. However, if we are considering a situation where 'read back' might refer to an equation involving calibration and verification, none of the options provided (a) Calibration × Verification, (b) Calibration ÷ Verification, (c) Verification - Calibration, or (d) Verification + Calibration is a commonly recognized mathematical operation named 'read back' equation. Thus, without additional context or clarification from the subject matter in which this term is being used, there's no standard equation known as the 'read back' equation in mathematics or related fields. In any situation requiring calibration and verification, these terms are typically used to ensure the accuracy of instruments or procedures rather than being components of an arithmetic formula.