Please respond

[sophisticatedpenguin]

Without rephrasing, would you personally support the punctuation in each?

20-30 year olds
20-30 year old men
20 and 30 year olds
30 year olds / 30 year old men
$10-20 million a year industry
$75,000-80,000 a year income
10-20 pound weights
60-70 cent a week deduction
a 20-30 degree temperature difference

Thank you.

[Darryl]

Yes.

[davel]

Ignoring totally the comment from BethLinn as it plainly an attempt to sell something and is almost certainly spam, I agree that the punctuation is fine in my opinion, but it means "between the lower number and the higher number".

[Bertha]

It's dishonest to buy an essay written by someone else when a student is supposed to be learning how to write one in order to achieve success in college.  I've caught many students during my years of teaching, and the students met with consequences which include being expelled from college.  Online writing services do not care.  They are only out to make money.