помогите решить!!! sin 3 π/2 *cos 3 π/2+ tg 3 π/2

Скалько соток составляют площади:

в) 12800 м2

г) 3/4  га 

где живет божий коровка в зимой?

Массовая доля 2 элемента 2 группы в высшем оксиде=50%. Найти хим.элемент

Раскройте скобки, употребляя глаголы в Present Continuous или в Present Simple. 1. It (to take) me forty minutes to get to school. 2. Hello, Pete, where you (to go)? — I (to hurry) to school. 3. When your lessons (to begin) on Mon­day? — They (to begin) at nine o'clock. 4. Where your sister (to be)? — She (to do) her homework in the next room. 5. It usually (to take) me an hour to do my written exercises. 6. Where Boris (to be)? I (to look) for him. - - He (to have) dinner. 7. In the evening I often (to go) to see my friends. 8. On Sunday we sometimes (to go) to the cinema or to a disco club. 9. Andrew (to get) up very early as he (to live) far from school, He (to be) never late. 10. It (to be) six o'clock in the evening now. Victor (to do) his homework. His sister (to read) a book. His mother and grandmother (to talk). 11. I (to write) a letter to my grandmother who (to live) in Novgorod. I (to write) to her very often.