500 ml of IV solution contains 75 mg of Medication X. If a patient receives this IV solution at the rate of 60cc/ hr, how much of this medication x will this patient receive after 20 hours of infusion?

Describe the domain and range of y=2(3)^x-2+5

If a is a nonzero real number then the reciprocal of a is

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.