Question

no, her hair needs to be tied back
yes, she is fine to wear that as long as it meets dress code.
yes! and it is a super cute outfit!
you are done with your lab, is it ok to leave these beakers the way they are?
no, they need to be cleaned and dried before class is over and returned to the original location
yes, the next class can clean it before they get started
yes, the teacher will clean them

Explanation:

In a laboratory setting, proper lab - equipment cleaning and storage are important for safety and to ensure the equipment is ready for the next use. Leaving beakers uncleaned and in place is not proper lab procedure.

Answer:

No, they need to be cleaned and dried before class is over and returned to the original location