Which person is demonstrating the critical approach to social research?

If f(x)=3x+1 and f^-1=x-1/3, then f^-1(7)=

The base of a triangle exceeds the height by 9 inches. if the area is 180 square inches, find the length of the base and the height of the triangle.

Atheater wants to build movable steps that they can use to go on and off the stage. they want the steps to have enough space inside so they can also be used to store props. how much space is inside the steps?