Which two tables represent data sets that could be fit to a normal distribution curve?

Apublic library wants to place 4 magazines and 9 books on each display shelf. the expressions 4s +9s represents the total number of items that will be displayed on s shelves. simplify this expression

Which expression is equivalent to 5r6141 2r+st6

You decide instead to take the train there. the train will take 135 minutes. convert this into hours and minutes.