If you had to take four 30 minute breaks during your trip to fill up on gas how long would it take you to get there in total

Consider that lines b and c are parallel. what is the value of x? what is the measure of the smaller angle?

Two angles are complementary. the larger angle is 36 more than the smaller angle. what is the measure of the larger angle?

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.