Answer:
83 i think. I learned this a while ago so it might be wrong but i believe supplementary angles add to 180 and complementary add to 360 :)
Step-by-step explanation:
Find the volume of each size stack by multiplying Length x width x height.
Once you have the volume for the 3 different stacks of books, add the together.
Bottom: 12 x 1 x 6 = 72 cubic inches per book x 2 = 144 cubic inches total.
Middle: 10 x 1 x 5 = 50 cubic inches per book x 2 = 100 cubic inches total.
Top: 7 x 0.5 x 4 = 14 cubic inches per book x 2 = 28 cubic inches total.
Total volume = 144 + 100 + 28 = 272 cubic inches.
Store A, which is $0.97/pound (1.94/2)
Store B is $3.22, Store C is $1.83, and Store D is $2.64
