How many chemical in cigarettes are known or suspected to cause cancer a) more than 10 b) more than 20 c) more than 50 d) more than 100

The lower respiratory system includes the a. lungs. b. esophogus. c. larynx. d. pharynx

Ab+cd-> ad+bc is what kind of reaction

Frankie is having difficulty developing a friendship with histeammate curtis. whenever frankie invites curtis to hangout with him at the park, curtis always says that he's busy. what is most likely preventing a healthy relationship fromforming? a)the boys are not being generous with their time andeffort. b)the boys are not communicating. c)both boys are too busy. d)the boys are on different teams.