the first option is the correct one
First oy ufind the hieth ande the width then you multiply them and add the othersa with addition
V=pi*r^2*h*1/3
12pi=pi*r^2*4/3
R needs to be equal to 3 to be squared into 9 to make the equation true.
So the radius is 3 inches.
I hope this helps!
4x+6=14
4x=8
x=2
4x+6=-14
4x=-20
x=-5
Final answer: x=-5, x=2