Suppose you have avogadro's number of mini marshmallows and use them to cover the state of north dakota which has a land area of 6.898×10^4 mi^2. each mini marshmallow has a diameter of 0.635 cm and a height of 2.54 cm. assuming the marshmallows are packed together so there is no space between them, to what height above the surface, in kilometers, will the mini marshmallows extend?