vertical stretch is always outside parenthesis and left and right shift is always inside parenthesis with left being adding the number while right being subtracting the number.
Im not too sure but I think its 4.6,because 1 in :.5 mile. As a whole, .5 can go into 2, 4 times, then whats left over also gets divided into .6. Add those together and youll get 4.6