A vehicle accelerates from 0 to 30 m/s in 10 seconds on a straight road, then travels 15 seconds at a constant velocity. Next it slows down, coming to a stop in 5 seconds. The car waits 10 seconds, and then backs up for 5 seconds accelerating from 0 to -10 m/s. Draw a graph showing the vehicle's velocity vs time by following these steps. What is the velocity of the vehicle at 0 seconds? 0 m/s Click or tap the graph to plot this point.

Ithink d is the right answer. hope this !

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.