Sử dụng phương pháp trung điểm, khi thu nhập bằng 7.500 đô la, thì độ co giãn của cầu theo giá trong khoảng từ 16 đô la đến 20 đô la là bao nhiêu?

it is definatly the 3rd one. very much looks like it, for a good chance, the third one would be best for you.

8(4)^8=72^feet to say that the total can conclude to 8(4) which as you know would mean 8 x 4. that equals 32w. 32^ could make a 72 answer as well. but your coefficent will remain w so your answer is 72w.

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