тело брошено вертикально вверх со скоростью 30 м/с. в некоторой точке А тело побывало дважды с интервалом в 2 с. определите высоту, на которой находится точка А

какой реактив растворяет "абсолютный этиловый спирт"?

В трапеции АВСД  диагональ ВД  Перпендикулярна  боковой стороне АВ, углы АДВ  и ВДС  равны  30градусам Найдите длину АД, если  периметр трапеции равен 60 см.

i want to tell you about my family. i have got a mother , a father , an elder sister , a grandfather and a grandmother. My mother's name is......... she is a teacher of English in one of Moscow schools. she is a very good teacher. my mother likes sewing and reading fashion magazines. My father's name is.......... he is a fonderful desiner. he works for a big publishing house. my elder sister's name is ........ She is going to be an accountant. Sometimes she helps me with my Maths homework. my grandmother and grandfather live in separate flat. They do not work now,because they are ritired. i love my family and i am so happy that we are together!Перевести