Can someone please help?

[15 points, algebra 2]simplify the complex fraction and find the restrictions.

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

Identify the function that contains the data in the following table: x     -2         0         2         3         5     f(x)     5         3         1         2         4     possible answers: f(x) = |x| + 1 f(x) = |x - 2| f(x) = |x - 2| - 1 f(x) = |x - 2| + 1