holding an average-sized dip or chew in the mouth for 30 minutes delivers as much nicotine as smoking how many cigarettes?

Which method of measuring weight involves comparing a person is weight and height

So i have a lot of answers answered but it says i still need to answer more questions. why is it doing that? how many questions need to be answered?

Which of the following human diseases is caused by a virus that requires reverse transcriptase to transcribe its genome inside the host cell? a) herpesb) aidsc) smallpoxd) influenza