question 9 (2 points)\nwhat is the default file extension for all excel documents?\n.txts\n.doc\n.xlsx\n.docx…

question 9 (2 points)\nwhat is the default file extension for all excel documents?\n.txts\n.doc\n.xlsx\n.docx\nquestion 10 (2 points)\nevery formula must begin with a\na parenthesis ()\n+ only\n= sign\nthe word \formula\

question 9 (2 points)\nwhat is the default file extension for all excel documents?\n.txts\n.doc\n.xlsx\n.docx\nquestion 10 (2 points)\nevery formula must begin with a\na parenthesis ()\n+ only\n= sign\nthe word \formula\

Answer

Answer:

Question 9: C. .xlsx Question 10: C. = sign

Brief Explanations:

Question 9: The default file - extension for Excel documents is .xlsx. Question 10: In Excel, every formula must start with an equal sign to indicate it's a formula.