nidhi is thinking of a number n, and she wants her sister to guess the number. her first clue is that eight less than three
times her number is between one and nineteen. write a compound inequality that shows the range of numbers that nidhi
might be thinking of.

Answer these questions showing your work plz

List x1, x2, x3, x4 where xi is the midpoint endpoint of the five equal intervals used to estimate the area under the curve of f(x) between x = 0 and x = 10.

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.