What is the measure of angle b?

44 degrees

Step-by-step explanation:

The sum of all the angles in a triangle is 180 degrees!

You are given the two angles in the diagram, 46 and 90

Here's the equation I used to solve it!

180 = 46 + 90 + x

1. 180 = 136 + x

2. 180 - 136 = x

4. x = 44

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

the answer is b.

step-by-step explanation: