How do scientists define an astronomical unit ?

a unit of measurement equal to 149.6 million kilometers, the mean distance from the center of the earth to the center of the sun.

Explanation:

it allows businesses to raise prices on basic goods. it allows consumers to spend more money on products. it increases government revenue to fund public projects. it provides more money for government assistance programs.

explanation:

in 550 b.c.e. cyrus the great, the leader of the persians, conquered the medes and united the iranian people under one ruler for the first time. cyrus became the first king of the persian empire and went on to establish one of the largest empires in world.