For this case we have that by definition it is fulfilled:

Where:
a: It is the base
b: It is the exponent
So, if we have the following expression:
-6 to the power of 4, is equivalent to: 
So we have to:
-6: It is the base
4: It is the exponent
Answer:
-6: It is the base
4: It is the exponent
X < 12 its actually very simple , just see that the x is on one side and nothing can be moved
X=0 because when you have something to the power of zero your answer is 1.
x=0 since 1 to the power of zero equals 1.
hope im not too late
A: Quadrant 1
B: The coordinates are 5, -3, quadrant 2
C: -5, -3, in quadrant 3