A=pie×radius squared is the area formula of a circle. The circumference formula or a circle is C=pie×diameter. 615.75=(3.14)(radius) squared. Divide both sides by the 3.14. What ever 615.75 divided by 3.14 is-is radius squared. The square root is your radius. The radius is half the diameter, so double what you have right now as the radius to get the diameter. Now since C=pie×diameter, your circumference is your pie×your diameter. Whatever your answer is-is your circumference.
        
             
        
        
        
Solve for x.
2x + 4= 8
4x - 88 = -352
x = [?] 
        
             
        
        
        
Answer:
54
Step-by-step explanation:
The circumfirance is the diameter times 2
 
        
             
        
        
        
Answer:
x = 12/11, -32/11
Step-by-step explanation: