Answer:
option 4
Step-by-step explanation:
g(x) = x² + 4x + 4
= x² + 2 * x * 2 + 2² {Compare with identity a²+ 2ab +b² = (a +b)²}
= (x + 2)²

Answer:look at the picture below
Step-by-step explanation:
The answer is 20 not 5 or 15 or 10
Since V = (4/3) * pi * R^3
If R is halved, V' will reduce by a ratio of (1/2)^3 = 1/8
So V' = (1/8)V