In degree measure, the angles π/3, π/4, and π/2 are respectively

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.

Math question.. plz me .. best answer all

Which of the following vectors are orthogonal to (2,1)? check all that apply