1: The value of Donald Duck's stock portfolio is given by the function v(t) = -3t+ + 73t+ 50, where v is the value of the portfolio in hundreds of dollars and t is the time in months. How much money did Donald start with? When will the value of Donald's portfolio be at a maximum? What will be the maximum value?​

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?