What is the domain of the function f(x) = 7/(x+2) +4?

Icould really use some with this question.

Which expression gives you the distance between the points (5,1)and(9,-6)

Estimate the area under the curve f(x) = 16 - x^2 from x = 0 to x = 3 by using three inscribed (under the curve) rectangles. answer to the nearest integer.