The most outstanding topographic feature on Earth is a global underwater mountain chain that surrounds the entire Earth and is taller than all the Mountains in the Unites States but one. True orFalse

Blank is a naturally occurring gas that's found in most soils and rocks and can cause lung cancer

Where does the availability of water pose the greatest problem

Brian's school locker has a three-digit combination lock that can be set using the numbers 5 to 9 (including 5 and 9), without repeating a number. the probability that the locker code begins with a prime number is %. the probability that the last digit of the locker code is an odd number is %.