Answer: Choice D
======================================================
Explanation:
The formula for the surface area of a cylinder is

We then replace r with 10 and h with 25. Keep in mind that the diameter is 20 mm, so the radius is half that at 10 mm.
So that's how we get to

Answer:
We need to know the other marbles in the bag and how many there are of each.
Answer:
y=7(x-5)+3
Step-by-step explanation:
Answer:
55 degrees
I answered the question on AoPS and it said it was correct.