Im assuming you meant the 9th term and thats 47
Answer:

Step-by-step explanation:
we know that
The volume of a right circular cone is equal to

where
r is the radius of the base of the cone
h is the height
Solve for r-----> That means, isolate the variable r
so
step 1
Multiply by 3 both sides

step 2
Divide by
both sides

step 3
take square root boot sides

Answer:
A 1 1/12
Step-by-step explanation:
just add 4 and 9 you get 13