3 x {28 divided by [ 6 divided by 2 x 3 - ( 4 - 2)]}

Answer these questions showing your work plz

Ann and betty together have $60 ann has $9 more than twice betty’s amount how much money dose each have

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