Which is the circumference of the circle

Consider the integral: 4 0 16 − y2 − 16 − y2 4 1 x2 + y2 dz dx dy . (a) describe w. use the standard view of the x, y, and z axes. front half of a cone with a rounded top. full cone with a flat top. right half of a cone with a flat top. front half of a cone with a flat top. right half of a cone with a rounded top.

What is the value of x? enter your answer in the box. photo attached.

The step function g(x) is defined as shown. what is the range of g(x)? ***answer choices in picture.