How do i find the displacement of an object using a velocity vs. time graph? i also have to draw position and acceleration graphs and im not sure how to get them to look like the velocity graph.

To find displacement, you take the area under the curve on a velocity-time graph, as the seconds cancel leaving you with displacement.  If the curve goes below the origin, be sure to subtract that area from the positive area.

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.