почему впадина прикаспийской низменности находящаяся ниже уровня океана на 28 м, не заполнена морской водой

Дан правильный шестиугольник ABCDEF . Найдите BD, если AB = 3

Imagine that your granny's friends from a remote place in Canada is staying with you. Write a short instruction on how to use one of the following devices.
(a microwave -to warm up pancakes, a personal computer - to write an e-mail to friend, a mobile phone- to call friends or send an SMS)
Dear Aunt Anne
I know that you don't like technological devices very much,but sometimes it's difficult to do without them,
If you need to____________________________________________________________________, take the following steps:_________________________________________________________
помогите пожалуйста написать письмо..

задание во вложениях(№45).Помогите пожалуйста!