Step-by-step explanation:
I) 9+9+9+9=36
Ii)radius is 4.5 L=2piR= 2pi(4.5)= 9pi
Iii) A=piR^2= pi(4.5)^2 = 20.5pi
IV) 9×9 =81
V) 81-20.5pi = 16.597
Answer:
A = π · (r²)
Step-by-step explanation:
π · r² is the area of a circle.
While π · r² · h can also give you the radius, it can only do so for the Volume 
, not the Area 
.
doesn't really apply for a circular object, as it requires the length and width. For circular objects, both are equal to the diameter of the object, and 2² · r² · h does not equal the Volume.
π · r³ seems awfully like the volume of a sphere, but there's something missing. The true volume of a sphere is 
· π · r³, not π · r³.
only applies for triangles.
I think it’s D
I’m not 100% bc it’s been a while since I learned about those
