Em uma sala de aula há 30 alunos, dos quais 40% são meninas. Quantas meninas tem na sala?​

Answer feldspar,quartz,mica and amphibole;

The correct answer is kettles.

Cpopulation density

When a lake, river or other aquatic  system  becomes  eutrophic, it can have serious negative effects on other organisms like fish, birds and even people.if an algal bloom is so bad that it causes wide-spread death  in  the  water, the organisms that die will all sink to the bottom and start to decompose.