Three research departments have
9

,
8

, and
7

members, respectively. each department is to select a delegate and an alternate to represent the department at a conference. in how many ways can this be done?

Set $r$ is a set of rectangles such that (1) only the grid points shown here are used as vertices, (2) all sides are vertical or horizontal and (3) no two rectangles in the set are congruent. if $r$ contains the maximum possible number of rectangles given these conditions, what fraction of the rectangles in set $r$ are squares? express your answer as a common fraction.

What is the domain of the function y=3 ln x graphed below?

Use the rules of exponents to simplify the expressions. match the expression with its equivalent value. 1. 2-1 ∙ 2-4 2. -32 3. ∙ 32 4. -