Answer:
The answer of CGF is 3.................
3
Step-by-step explanation:
List the factors of each number
factors of 9 are 1, 3, 9
factors of 12 are 1, 2, 3, 4, 6, 12
The common factors are 1 and 3
GCF = 3
6
v = -3w
water level/volume = -3 x weeks
