A building has eight levels above ground and one level below ground. The height of each level from floor-to-ceiling is 14 1/2 ft. What is the net change in elevation going from the floor of the Underground Level to the ceiling of the 4th floor above ground? Assume the floor at ground level is at an elevation of 0 feet.

11 feet 6 inches and 8 feet 6 inches

in the attachment.   i didn't see your choices.   the word which means there is choices.

step-by-step explanation:

(x,y)

x tells you how much left or right you go from the origin

y tells you how much down or up you go from the origin

so for example (-3,2), you go left 3 and up twice. i denoted which of the ordered pairs is which in my graph.

7 is the median   7.875 is the mean

step-by-step explanation:

3,4,5,6,8,11,13,13