Answer:C
Step-by-step explanation: You want to add up all the marbles, and then take the red marbles and divide by all the marbles 7/20
If 3 squared is 9 then 9 times -2 is -18 plus 7 is -11
B) x=2 and y=14 i’m pretty sure lol
C=2pir
20pi=2pir
20pi/2pi=2pir/2pi
R=10
Height=10/2=5
Two circles surface areas is
2*pir^2
2pi10^2
2*100pi
200pi
The cylindrical part is
2pirh
2pi*10*5
100pi
Add 100pi+200pi=300pi