Answer:
equation that gives the value of circumference 


Explanation:
Given:
Diameter of a circle is 56 feet
The equation that gives the value of the circumference of the circle is 
 -------------(1)
-------------(1)
Where 
 and
 and 

Put the value of diameter and 
 in equation 1.
 in equation 1.


Therefore, the circumfrance of the circle is 175.84 feet.