Ao buscar informações sobre as commodities, você deve ter verificado que, muitas vezes, estas apre. sentam um preço regulado pelo comércio internacional. Faça uma pesquisa usando como fonte, pre.
ferencialmente, o site da Bolsa de Valores de São Paulo (Bovespa) e escreva, na tabela a seguir, a cota-
ção (preço em dólares) das commodities indicadas.

Amath expression is a collection of one or more terms, which are separated by the signs ( + , - , x , / ).example :   8+b8+b  or  a−3a−3in algebra, an equation is a mathematical statement with two expressions where, each expression is separated by an equal (=) sign. variables can be present on both the sides of the equality (=) sign and we use letters to denote such variables.example 1:   x=4+2x=4+2  , [here, we can observe that the variable is present only on one side of the equation].example 2:   2x+3=x+42x+3=x+4  , [here, we can observe that the variables are present on both side of the equation].

It is nonrenuable which means that once you have used it, it's gone forever.

Answer a mineral that contains a combination of silicon, si, and oxygen, o, is a silicate mineral. hope it ^.^