Aboat moves 60 kilometers east from point a to point b. there, it reverses direction and travels another 45 kilometers toward point a. what are the total distance and total displacement of the boat?
a. the total distance is 105 kilometers and the total displacement is 45 kilometers east.
b. the total distance is 60 kilometers and the total displacement is 60 kilometers east.
c. the total distance is 105 kilometers and the total displacement is 15 kilometers east.
d. the total distance is 60 kilometers and the total displacement is 45 kilometers east.

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.