no
No, the word "nineteen" does not need a hyphen when written numerically.
They had to try to predetermine how many people would choose the new product.
It's not a word in the dictionary, so yes, use the hyphen.
No. The word is "pinpoint".
nope
No the word "midday" is not hyphenated.
No, the word "coordinator" is one word.
The word "desperate" doesn't need a hyphen.
Yes, in-home does need a hyphen. It's two words put together to form a word for a different concept.
choose predetermine
Yes it should be hyphenated.