Answer:
r = 4 inches
Step-by-step explanation:

Hey there! :D
To find the geometric mean, you multiply the numbers and then find the square root.
12*3= 36
The square root of 36 is 6.
The geometric mean is 6.
I hope this helps!
~kaikers
Answer:
x+3
Step-by-step explanation:
Answer:
C
Step-by-step explanation:
C