Question. Six Professors and five PHD
Student are to be seated for
Photographs in a row such that no
two PHD student and no two Professor
Sit together. Find the number
of ways in which this can be done

Quadrilateral abcd in the figure below represents a scaled-down model of a walkway around a historic site. quadrilateral efgh represents the actual walkway. abcd is similar to efgh. what is the total length, in feet of the actual walkway?

Afamily has five members. a mom, a dad, two sisters, & a brother. the family lines up single file. what is the probabillity that the mom is at the front of the line

If f(x) and g(x) are inverse functions of each other, which of the following shows the graph of f(g(x)