Which of latin america’s elevation zones is the coldest and experiences permanent ice and snow?
a.
tierra fría
b.
tierra helada
c.
tierra nevada
d.
tierra caliente

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 %.

Which country in the video has the highest population growth rate?

Which barrier to economic development is shown in the following examples?