Acar accelerates uniformly from rest to a speed of 76.8 mi/h in 7.62 s. find the constant acceleration of the car. answer in units of m/s2

Acceleration = (change in speed) / (time for the change)

                   =      (76.8 mi/hr)    /       (7.62 sec)

                   =        10.08  mile/hour-second

That quantity is a perfectly good acceleration, it has the right
dimensions etc, but the question asks for it in units of meter/s²,
so I have to convert it to the equivalent in meter/s².

         (10.8  mile / hr-sec) x (1,609 meter/mile) x (1 hr / 3600 sec)

      =   (10.8 · 1,609 · 1) / (3,600)       meter / second²

      =        4.83 meter / second²   if you round all the numbers as you go
or 
                4.51 meter/sec²     if you use a calculator and don't round anything    

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.

Sorry can’t u just tryna get points