Atmospheric pressure is about 100 kPa at sea level. What would the air pressure be at 10,000 meters above sea level? about 30 kPa
0 kPa
about 150 kPa
the same, 100 kPa

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].

Answer (d) the greenhouse effect is primarily caused by car and trucks;

Empty quarter and sandy desert