Well, honey, technically speaking, you don't need a hyphen for "hand deliver." It's considered a closed compound word, but some style guides might prefer it with a hyphen for clarity. So, do whatever tickles your fancy, darling.
It does not need to have a hyphen! :)
Yes.
Yes, according to Bond11Plus
No it doesn't require a hyphen.
No, the word "nineteen" does not need a hyphen when written numerically.
Yes, "handheld" typically does not require a hyphen when used as an adjective to describe devices like "handheld device" or "handheld console." However, "hand-held" with a hyphen is also acceptable in some contexts, particularly when used as a verb or for emphasis. Ultimately, consistency is key, so it's best to choose one form and use it throughout your writing.
No
That would depend on the way it is used in the context of a sentence. Take the following 2 sentences:We have 10 of those components on hand.This list shows on-hand hardware available in inventory.In the second sentence, on-hand is used as an adjective describing the hardware, therefore it would need a hyphen. In the first sentence, on hand is noun because it is a state of the word components.
It's not a word in the dictionary, so yes, use the hyphen.
I do not believe that multitasking is supposed to have a hyphen.
You typically need only capitalize after sentence-ending punctuation, which a hyphen is not.
no