It’s c because if you look at it shows that it could do straight line
The diameter is 9.
Circumference=pi*diameter
9 pi/pi=9
Hope this helped☺☺
I assume that the equation you mean is below:

To find roots for this equation, we have to get rid of the denominator. We can do by multiplying both sides by 3.

Factor w-term out (common factor)

Answer
- The roots of quadratic equation are 0,-3