Well, I can't figure out the answer at the moment, but I can give you a tip. Just substite each possible sign in the to see if one works... for example: +++, x+-, ++-....
Hope this helps you out :)
Here you go:
3 to five or 5 to 3
V= 3.14r^2h
10/2= r
5^2= 25
(3.14)(25)(6)
V=471
Answer: 16, rational
Step-by-step explanation: because its a real number
