The surface area formula for any sphere is 4(pi)(radius)^2
The radius is half of the diameter.
18.6 / 2 = 9.3
So, plug into the formula and solve.
4(3.14)(9.3)^2 = 1086.3 mm^2
Well it would be C! so 78-74=4 so they are counting by 4's and 86+4=90 :33
I would try Khan Academy. He does very good explainations
Answer:
D) 180
Step-by-step explanation:
