A(n)is the intersection of a solid and a plane.

A. edge

B. vertex

C. cross section

if you're trying to figure out how much each ounce cost it would be 0.20

cents each ounce

you estimate that the angle of elevation to the top of the 86th floor (the observatory) is 82 .the total height of the building is another 123 meters above the 86th floor.

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29 is x=.7

30 is y=3.375 or 3 and 3/8