Which fraction and equivalent decimal correctly shows the ratio of shaded circles to white circles?

Step-by-step explanation:

https://tex.z-dn.net/?f=4-shaded%5C+circles%5C%5C12-all%5C+circles%5C%5C%5C%5C%5Cfrac%7B4%7D%7B12%7D%3D%5Cfrac%7B4%3A4%7D%7B12%3A4%7D%3D%5Cfrac%7B1%7D%7B3%7D%3D0.333...

since the airplane is moving with constant speed then the distance travelled can be calculated by x=u*t

in km/h would be:

x=640*3.5=2.240 km

in m/s would be:

u=640 km/h= 640.000 m/h =640.000/ 3600 m/s =177.8 m/s

t= 3.5 h= 3.5 * 3600 s=12.600 s

then x=u*t= 177.8*12.600= 2.240.280 m