Answer:
option c is the correct.
Step-by-step explanation:

by using the laws of exponent
a^m×a^n=a^m+n
12x^4+2/3x²

4x^4-3
4x³
$4.89
- First subtract 116-72
-then divide that answer by nine
-round
Answer:
C = 18.85 mm
OR
C = 37.7 mm
Step-by-step explanation:
if 6mm is the diameter.... then
6/2 = radius
3 = radius
then circumference = 2π(3)
C = 18.85 mm
BUT IF THE RADIUS IS 6MM
then circumference = 2π(6)
C = 37.7 mm