Answer
$$Minimum: 17.5in×14.5in=253.75in^2$$
$$Maximum: 18.5in×15.5in=286.75in^2$$
Work Step by Step
Since the original values are whole numbers to find the minimum area we will go down a half inch on each number and for the maximum area we will go up a half inch on each number.
$$Minimum: 17.5in×14.5in=253.75in^2$$
$$Maximum: 18.5in×15.5in=286.75in^2$$