Question

What is the equation of a circle with center (8,4), and radius 7?

Answer 1

The general equation of a circle is:

`(x-h)^2+(y-k)^2=r^2`

Where:

(h, k) are the coordinates of the center.

r is the radius.

In this case:

Center: (8, 4)

Radius: 7

Then, we use the equation of the circle:

`(x-8)^2+(y-4)^2=7^2`

Then simplify:

`(x-8)^2+(y-4)^2=49` The correct answer is option 4