The video hints at one of the challenges of having mechanical vehicles in an active theater of war. What challenge is that?

An active cell. a circular reference occurs when a cell in an excel 2010 worksheet refers to itself.

You have several options when you want to enter data manually in excel. you can enter data in one cell, in several cells at the same time, or on more than one worksheet at the same time. the data that you enter can be numbers, text, dates, or times. you can format the data in a variety of ways. and, there are several settings that you can adjust to make data entry easier for you.

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