Answer:
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A. h = 30Ft * 1.26cm/Ft = 37.8 cm. = Ht. of the model.
37.8cm * 1toothpick/6.3cm = 6 Toothpicks
B. 37.8cm/7.6 = 4.97 hope this helped.
So we see the ratio of the sides of two similar octagons is 2:5 so let's say the first octagon has a side of 2 and the other has a side of 5. 2*8 = 16 and 5*8 = 40. 16:40 = 4:10 = and is again 2:5. So the answer is 2:5.
3x-5 is a midline of that triangle so:

Answer D.
I think that the answer is A.