Answer: 2.12 miles.
Step-by-step explanation: To find the width of Hardee County, we need to determine the length of one of its sides. We can use the fact that the area of a rectangle is equal to its length times its width to find the length of one of its sides.
The area of Hardee County is 637 square miles, and we know that its width is 30 miles. We can use this information to write the following equation: 637 square miles = 30 miles * length
We can solve this equation for the length by dividing both sides by 30: 637 square miles / 30 miles = length
This simplifies to: 21.2 square miles = length
Since the length of a rectangle is one of its sides, the width of Hardee County is 21.2 miles.