No, "agency wide" does not need a hyphen when used as an adverbial phrase. It should be written as "agency wide" when describing something that applies across an entire agency. However, if used as a compound adjective before a noun, it is typically hyphenated as "agency-wide." For example, you would say "an agency-wide policy."
The term "community-wide" does require a hyphen when used as a compound adjective before a noun. For example, you would say "a community-wide event." However, if it follows the noun, you would write it without the hyphen, as in "the event was community wide."
No it doesn't require a hyphen.
Yes, you should use a hyphen in "district-wide" when it functions as a compound adjective before a noun, such as in "district-wide policies." However, if it comes after the noun, you typically do not use a hyphen, as in "the policies are district wide."
Use a hyphen when the parts of the compounds are not commonly used together. Common compounds: worldwide, clockwise Unusual compounds: community-wide, nutrition-wise
It does not need to have a hyphen! :)
No, the word "nineteen" does not need a hyphen when written numerically.
No
I do not believe that multitasking is supposed to have a hyphen.
It's not a word in the dictionary, so yes, use the hyphen.
You typically need only capitalize after sentence-ending punctuation, which a hyphen is not.
no
No.