The number of rabbits on an island monitored by scientists was 40 initially. The rabbit population increased at the rate of 12% per week. A) - Write an exponential model for the amount of rabbits on the island

B) - How many rabbits will be on the island after 15 weeks? ​

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.