Are 3/9 3/10 3/11 3/12 in least to greatest form

If f(x)= 3x+6 which of the following is the inverse of f(x)

Which of these numbers of simulations of an event would be most likely to produce results that are closest to those predicted by probability theory? 15, 20, 5, 10

Kristen is wrapping presents for the holidays. she has a box that measures 4 ft. x 2 ft. x 2 ft. how many square feet of wrapping paper does she need to cover the box without overlapping?