Must I double-spaced when I am merely typing answers to questions found, or located, in my textbook? Also, must I replicate a particular format?

Ask your teacher what s/he wants.

It doesn't matter to her. However, I do not know of any matter which is recommended for merely typing answers.

Then do it however you want to do it.

Whether or not to double-space when typing answers to textbook questions and whether to replicate a particular format depends on the guidelines provided by your instructor or the instructions in the textbook. It's important to follow any specific formatting instructions mentioned by the instructor or textbook because they may be looking for consistency and ease of reading.

To determine if you should double-space, you can refer to the guidelines or instructions given by your instructor or refer to any formatting guidelines mentioned in the textbook. These guidelines will typically specify whether double-spacing is required or if single-spacing is acceptable.

Similarly, if the textbook or instructor provides a specific format or structure that they expect for answering the questions, it's important to adhere to it. Some textbooks may provide a preferred format or template for answering questions, such as including numbered or bulleted lists, providing specific headings, or using a particular style guide like APA or MLA.

If you're unsure about the formatting requirements, the best course of action is to consult with your instructor or refer to any provided guidelines or instructions. Additionally, you can also check if there is any course syllabus, assignment rubric, or other supplementary materials that may provide further clarification on the formatting expectations.