What is the maximum distance we can shoot a dark, provided are toy dart gun gives a maximum initial velocity of 5.84 m/s

Newton's first law of motion is to the effect "every body continues in a state of rest, or uniform motion in a straight line, unless acted on by a resultant external force".So, the dart has been forced up to a speed of 5.84m/s. The question does not mention any other forces, and so, according to my understanding of Newton's law, the maximum distance is infinite or undefined. If there is further information available, that would specify the problem, and thus enable a more specific solution.

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.