Joe paid $105.00. He drove 300 miles at $.25 per mile which equals $75.00. Adding the $30.00 per day charge for 1 day to the $75.00 gives us the answer of $105.00.
If the length is 7/6 the width w then the perimeter is w + (7/6)w + w + (7/6w) = 2((7/6)w + w) = 2w + (14/6)w = (26/6)w = (13/3)w. So the answer is the last one.