Help me please for me it’s confusing

  -∞ < x < 0

Step-by-step explanation:

The domain is the horizontal extent of the graph.

The arrow at upper left means the graph extends to infinity upward and to the left.

The open circle on the y-axis means the value x=0 is not included in the domain.

So, the graph extends from -∞ to as close to zero as you like:

  domain: -∞ < x < 0

the answer is c: divide the arc's degree measure by 360°, then multiply by the circumference of the circle.

1^3 + 2^3 + 3^3 +4^3 = (1+2+3+4)^2

step-by-step explanation:

i am only able to answer the first part. i am not sure about the second part. sorry