The value of r is 4 feet, the correct option is A.
The area of a circle is the region occupied by the circle in a two-dimensional plane.
Given
The area of circle Z is 64 ft2.
According to the following formula, we must find the radius of the circle:
[tex]\rm r =\sqrt{\dfrac{Area}{\pi }}[/tex]
Substitute all the values in the formula
[tex]\rm r =\sqrt{\dfrac{Area}{\pi }}\\\\\rm r =\sqrt{\dfrac{64}{3.14}}\\\\\rm r =\sqrt{20.38}\\\\r=4.5[/tex]
Hence, the value of r is 4 feet.
To know more about the area of the circle click the link given below.
https://brainly.com/question/19164857