:)CAN SOMMEONE PLS HELP ME

The independent variable is the days, and the dependent is the amount of sales.

Step-by-step explanation:

The days are independent because there is no way to change it, and it will always be. (like a schedule depends on time)

The sales are dependent because they rely on the days, especially because you can't sell things without there being time.

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

what i would say the best answer is a. 40.5