Answer:
25 cm
Step-by-step explanation:
where r is the radius of the circle
Plug in the given radius (4 cm)

Therefore, the circumference of the opening is approximately 25 cm.
I hope this helps!
D. 1010.37 km ! blah blah blah blah b
I believe the answer would be D
No, an obtuse triangle can only have one obtuse angle because when there are two angles greater than 90 the interrior angles become greater than 180°
46.94 ≈ 47
7.09 ≈ 7
10/40 = (10*1)/(10*4) = (10/10)*(1/4) = 1/4