Which of the following parabolas opens up? a. directrix: y = 2; focus: (−3, −5) b. directrix: y = 2; focus: (3, 5) c. directrix: y = −2; focus: (3, −5) d. directrix: y = −2; focus: (−3, −5)

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.