Why do airline pilots use great-circle routes to plot airline flight paths?

Why does sweden and norway have steep roofs

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 %.

In the developed world, describe the changing role of women in agriculture.