When graphing the function f(x) a= [×+5] + 12 on your graphing calculator what is the most appropriate viewing window for determining the domain and range of the function

Boris needs to buy plastic spoons. brand a has a box 42 spoons for $2.37. brand b has a box of 72 spoons for $3.57. find the unit price for each brand. then state which brand is the better buy based on the unit price. round your answer to the nearest cent.