Mia is building a three sided shelter for her action figures. The shelter will resemble a rectangle with one of the long sides removed. She has boards that measure 36 inches, 39 inches, and 42 inches in length; all boards are the same width. Mia will need to convert some of these measurements into other units of measurement to build her shelter the way she wants. Answer the following questions, typing out the equations you used in your response. Which board will Mia use for the length of the shelter, given that 1 foot=12inches?

To determine which board Mia will use for the length of the shelter, we need to convert the measurements to a common unit. Since 1 foot is equal to 12 inches, we can convert the measurements to feet by dividing by 12.

For the 36-inch board:
36 inches ÷ 12 inches/foot = 3 feet

For the 39-inch board:
39 inches ÷ 12 inches/foot = 3.25 feet

For the 42-inch board:
42 inches ÷ 12 inches/foot = 3.5 feet

Therefore, Mia will use the 42-inch board for the length of the shelter.