You owe $10,000 on a car loan. the bank charges a compound interest rate of 9.5% per year. if you don't make any payments on the loan, how much will you owe after 3 years? round your answer to the nearest whole cent.
a.$13,129.32
b.$14,376.61
c.$12,246.83
d.$11,990.25

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.