Почему происходят вертикальные перемещения воздуха?

Put the verbs in brackets into the past continuous or the past simple. Then, put the pictures in the right order. It 1) ...was.. (be) a beautiful spring morning when Emma and her father 2) (decide) to visit Seaton Castle. The sun 3) (shine) and the birds 4) (sing). Emma 5) (feel) very excited. The castle 6) (be) very old and made of stone. They 7) (climb) the steps to the top of the tower. While they 8) (admire) the view, they 9) (hear) some noises. They 10) (look) around but they 11) (not/see) anybody. That’s funny said Emma. I 12) (think) I 13) (see) someone standing over there. After a while they 14) (decide) to visit the cellar of the castle. Emma 15) (examine) an old barrel when she 16) (hear) the door of the cellar close behind them. ‘Dad,’ she 17) (say), ‘don’t close the door!’ ‘But, I 18) (not/close) it, dear,’ her father said. Emma 19) , (turn) around and 20) (see) a shadow on the wall. She 21) (know) then that the ghost of Seaton Castle 22) (watch) them!

Кусок полотна 124 м надо разрезать на две части так, чтобы длина одной части была на 12 м больше, чем другой. По сколько метров полотна будет в каждой части? Решите пожалуйста уровнением.

1)Найдите первые пять членов геометрической прогрессии (Bn) если:

А)b1=-16 и q=1/2

Б)b1=-24 и q=-1.5

2)Последовательность(Xn)-геометрическая.Найдите: x6 если x1=-125,q=0.2