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
Hey!
Area is equal to length × width. First find the area of the rectangle.

The area of the rectangle is 14.04 mm². That means the area of the square is also 14.04 mm². In a square, all 4 sides are the same. The length and width are the same.
Try all choices and see which is the closest




The 1st choice is the closest.

Answer:
The answer is 120 sq. ft.
13 songs per cd 4/4 and 52/4= 1/13