The value of the computer decrease exceptionally throughout the five-year period. What was the average annual amount of decrease (in dollars per year) over the two-year interval from t= 2 to t= 4?

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.