Answer:
D
Step-by-step explanation:
Extending answer to be able to send.
Answer:

Step-by-step explanation:
First, we'll find the length of the radius using distance formula and the coordinates (0,0) and (7,0)
Distance Formula = 
R = 
R = 
Radius = 7 units
<u><em>Now, Equation of circle:</em></u>

Where (a,b) = (0,0) So, a = 0, b = 0 and R = 7 units
=> 
=> 
This is the required equation of the circle.
<h2>Greetings!</h2>
An easy way to remember this is along the corridoor, up the stairs!
That being said the first number, -3.5, is a negative which means it will be on the left hand side of the x axis. Simply look for the point that goes along this line.
And the second number, which is the point on the y axis, is a positive number which means it is above the x axis. Simply look for the point that is along y = 4
This means you can find the point, which in this case is Z.
<h2>Hope this helps!</h2>
Answer:
r= 
r= -
Step-by-step explanation:
8=
Square root both sides of the equation.
r= 
r= -