Which expression is equivalent to 34 ⋅ 3−9?

The correct answer is

Step-by-step explanation:

We are given an expression:

In an exponential expression, when the bases are same, the powers get added up.

Here, the base is same which is 3. So, the powers will get add up.

Solving the expression, we get:

Hence, the correct answer is

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