The diagram shows two sets of vectors that result in a single vector. what are the first two steps for finding the magnitude of the resultant vector? find the square of the first horizontal vector and the square root of the first vertical vector find the square root of the first horizontal vector and the square root of the second horizontal vector find the sum of the two horizontal vectors and the sum of the two vertical vectors find the difference between the two horizontal vectors and the difference between the two vertical vectors

Neptune is the eighth planet from the sun. it was the first planet to get its existence predicted by  mathematical calculations  before it was actually seen through a telescope on sept. 23, 1846. irregularities in the orbit of  uranus  led french astronomer alexis bouvard to suggest that the gravitational pull from another celestial body might be responsible. german astronomer johann galle then relied on subsequent calculations to   spot neptune via telescope. previously, astronomer galileo galilei sketched the planet, but he mistook it for a star due to its slow motion. in accordance with all the other planets seen in the sky, this new world was given a name from greek and roman mythology — neptune, the roman god of the sea.