Beginning inventory is 100 units. we sell 30 units and purchase 20. ending inventory is 85 units. what is the

The correct answer is 15.

Step-by-step explanation:

100 units - 30 units = 70 units + 20 units = 90 units - 85 units = 15 units  Which means they sold 15 more units

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