Final answer:
Mia will use Option 1: 39 inches for the length of the shelter as it is the closest option to 3.25 feet.
Step-by-step explanation:
To find the board that Mia will use for the length of the shelter, we need to convert the given options from inches to feet. Given that 1 foot = 12 inches, we can divide the length of each option by 12 to convert it to feet:
- Option 1: 39 inches = 39 / 12 = 3.25 feet
- Option 2: 36 inches = 36 / 12 = 3 feet
- Option 3: 40 inches = 40 / 12 = 3.33 feet
- Option 4: 42 inches = 42 / 12 = 3.5 feet
Based on these calculations, Mia will use Option 1: 39 inches for the length of the shelter, as it is the closest option to the desired length of 3.25 feet.