You do not use a hyphen when writing square feet. Using a hyphen would make it one word which should not be the case.
Yes, whenver using square-foot you should use a hyphen
Hightech Information System was created in 1987.
No there shouldn't be a hyphen. Fingernails and toenails are full words.
What about the adjective form? e.g.: We went on an hour-and-a-half long drive.
The dictionaries that list it use a hyphen.
No, excitingly is one word so you would not use a hyphen in it.
It isn't in the dictionary, so it'd be best to use a hyphen.
no
It's not a word in the dictionary, so yes, use the hyphen.
Yes, there is a hyphen in "fifty-nine." When writing out compound numbers from twenty-one to ninety-nine, a hyphen is used to connect the two parts of the number. Therefore, it is correct to write it as "fifty-nine."
In a range name instead of using a space or hyphen, use a?