Examples of algorithms are

• A. musical notes.
• B. baseball card collections.
• C. mathematical formulas.
• D. mechanical solutions.

Answer: (C)

Verified step by step guidance

1. Understand the concept of an algorithm: An algorithm is a step-by-step procedure or formula for solving a problem.
2. Identify the characteristics of algorithms: They are precise, systematic, and often involve mathematical or logical operations.
3. Evaluate each option: Consider whether each option fits the definition of an algorithm.
4. Analyze 'musical notes': Musical notes are not algorithms as they are not step-by-step procedures for solving a problem.
5. Analyze 'mathematical formulas': Mathematical formulas can be considered algorithms as they provide a systematic way to solve mathematical problems.