Which two sentence correctly use a dash?
Most of the working population today is troubled- by lack of sleep.
You need to sleep 6-8 hours daily to maintain a healthy body.
The secret to improving your productivity is simple-get a good night's rest.
I found something unexpected in my trash can-a litter of raccoons

You need to sleep 6-8 hours daily to maintain a healthy body.

The secret to improving your productivity is simple-get a good night's rest.

Explanation:

When you are listing specific numbers, sometimes you put a dash in between them: "6-8 hours daily" means "6 to 8 hours daily." In the next right answer sentence, sometimes you use a dash(hyphen) in between words to show that the words after the hyphen go accordingly to the words before. The first part of the sentence says "the secret to improving your productivity is simple-" Then, the second part of the sentence shows what the secret to improving your productivity is: "get a good night's rest."

b. legendary founder of thebes