To determine which board Mia will use for the length of the shelter, we need to convert the desired length from feet to inches.
Mia wants the length of the shelter to measure 3.25 feet. We can convert this measurement to inches:
- Convert feet to inches: \[ 3.25 , \text{feet} \times 12 , \text{inches/foot} = 39 , \text{inches} \]
Now we have that the length of the shelter is 39 inches.
Next, we will compare this with the available boards:
- Board 1: 36 inches
- Board 2: 39 inches
- Board 3: 42 inches
Since the width of the shelter will be shorter than the length, and the only board that can serve as the length of 39 inches is Board 2, this means:
The board Mia will use for the length of the shelter is Board 2 that measures 39 inches.