Answer:

Note:
Three-tenths reapeating is 
Answer: it can be any equation that would equal 100
Step-by-step explanation:
Answer:
I think A
Step-by-step explanation:
I am not quite sure what this is asking, but based off of what I can tell it should be A.
Hope this helps :)
The formula for a cone is

insert 20 for your height and rearrange the formula to find the radius. Leave a comment if you need more help.