a tree casts a shadow that is 150 feet long. if the angle of elevation from the tip of the shadow to the top of the tree is 30 degrees how tall is the tree to the nearest foot

The answer to this question is b

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].

Nation of conflicting ethnic groups

Answer erosion,oil spills,pollution,tourism,urban development;