ANSWER
The radius is 4
EXPLANATION
The given equation is:

We complete the square to get the expression in standard form:


We factor using perfect squares to get:

This implies that,

Comparing to

The radius is r=4
Answer:
A
Ratio is 2:1
Step-by-step explanation:
Point B is located at point (4, -2)
Answer:
see explanation
Step-by-step explanation:
Using the rules of exponents
×
= 
= 
×
= 