What is 0.5, 3/16,0.75,5/48 from least to greatest plz tell me

How do i do this activity, is appreciated

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

Weekly wages at a certain factory are normally distributed with a mean of $400 and a standard deviation of $50. find the probability that a worker selected at random makes between $450 and $500