Answer:
8pi
Step-by-step explanation:
The formula for circumference is the radius multiplied by
. In this case,
. Hope this helps!
Answer:
34.64 ft
Step-by-step explanation:
Distance from the building = 20 ft
Angle of inclination = π/3 radians
The tangent of the angle of inclination must equal the height of the building divided by the distance of the observer from the building:

The building is 34.64 ft tall
It would be first 31/40,0.7,78%
It might be wrong