11. Higher Order Thinking 25 students are working in groups on a science project. Each group can have either 2013 students in it. What is the fewest number of groups there could be?

#12 find the value of x. #13 find the value of the variable.

Prove that (x-2)is factor of p (x)=2x³-3x²-17x+30

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.