Question

which object tells word that a formula is being entered into a cell?○ equations○ arguments○ equal sign○ formula mask

Explanation:

In Microsoft Word (and spreadsheet tools integrated with it), typing an equal sign at the start of a cell signals to the program that a formula is being inputted, rather than regular text. The other options do not serve this trigger function: equations are the result/type of formula, arguments are components within a formula, and a formula mask is not related to initiating formula entry.

Answer:

○ equal sign