The distance from earth to the sun, as measured at 149,597,870.691 kilometers, is called
a. the earth/sun continuum.
b. an astronomical unit.
c. the speed of light.
d. an orbital distance.

The correct answer is: B) An Astronomical Unit

If I managed to help you, please make sure to mark my answer as the "Brainliest" answer. Thanks! :)

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].