There is a $81,818 loan with annual interest due. There was $900 in closing fees and $6,300 in total interest the first year. If the APR is the finance charge (interest plus fees) for one year ÷ amount financed, what was the APR for that year?

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At the county fair, animals are judged for the quality of their breeding and health. the animal pens are arranged in an array, with one animal in each pen. a barn can hold at most 10 rows of pens and at most 6 pens in each row, with room for people to walk around them. what different ways can the planners of the county fair arrange the pens for the horses and cows in the same barn?