In circle a, mbec is 290º.

what is the measure of ∠bac ?

70º

130º

170º

360º

Option A is correct.

70 degree

Step-by-step explanation:

In a given circle A:

To find the measure of .

We know that a complete circle is of 360 degree

Substitute the given values we have;

Subtract 290° from both sides we get;

Simplify:

Therefore, the measure of is, 70 degree

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

12

step-by-step explanation:

12 + 5 = 17

12x2=24

24-7=17