The space shuttle orbits at 248 km per hour above the earth how often do the astronauts see the sunrise in minutes
mass of the earth 5.97 times 10 to the 24th
radius of the earth 6800km
g = 6.67times 10 to the negative 11 m cubed kg to the negative 1 s to the negative 2

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].