13)
In which medium would sound travel the fastest?
A) across a room
B) in a swimming pool
C) through outer space
D) through a railroad track

Which of the following is not a defining characteristic of plants?

Which of the following can be reduced by the use of renewable energy sources? a. social costs b. economic costs c. environmental costs d. all of the above select the best answer from the choices provided a b c d

How have high taxes on tobacco products impacted the number of people who use them? a. the number of tobacco users has increased. b. the number of tobacco users has decreased. c. the number of tobacco users has not changed. d. the number of adolescent tobacco users decreased, while the number of adult users increased