Answer:
C
Step-by-step explanation:
Recall the equation for a circle:
, where the center is (h,k) and the radius is r.
The given equation is:

Another way to write this is:

Thus, we can see that h=-5 and k=-7.
The center is at (-5, -7).
Answer:
12
Step-by-step explanation:
hope it helps
2*10^9 i'm pretty sure it would be d.
U just add the exponents.
b^8 x b^4 = b^12
hope this helps :)