Help Helppp please help i will mark brainliest. No links please give explanations. I will report you if you give links please help. The question is down below please help

Julia is going for a walk through the neighborhood. what unit of measure is most appropriate to describe the distance she walks?

The radius of a sphere is 3 inches. which represents the volume of the sphere?

Given that y varies directly to the square root of (x + 1), and that y = 1 when x = 8,(a)express y in terms of .x,(b)find the value of y when x = 3,(c)find the value of x when y = 5.