This is not a geography question!
Don't you need to know your weight for this calculation?
You are lying down on your bed in the dorm, which measures 3 feet by 6 feet. Calculate the pressure in psi (lbs / sq inch) your body exerts, spread out upon the total area bed. 1 foot = 12 inches.
3 answers
Its a geography class but i guess it is a physics question, I believe you do need to know your weight, i just need help setting the problem up.
http://en.wikipedia.org/wiki/Pounds_per_square_inch