Which polynomial represents the sum below? 3x^6 +4x+3 3x^8+6x + a. 3x8 + x6 + 4x + 3 b. 6x14 + 4x + 3 c. 3x8 + 3x6 + 10x + 3 d. 3x8 + 10x7 + 13x + 4

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