Laura kept track of the trick-or-treaters who came to her door and found that 2/3 were dressed as ghosts and 1/6 were dressed as witches. What fraction of the trick-or-treaters were dressed as either ghosts or witches?

from the figure we get,

the x axis shows   the months and,

the y-axis shows the number of satisfied customer.

each line or each cell in upward direction (y-axis) shows 500.

the appropriate scale for the y - axis is: -

a = 2000 customers

b = 4000 customers

c = 6000 customers

d = 8000 customers

e = 10000 customers

f = 12000 customers

g = 14000 customers

i believe the answer is the polygon, heptagon.

the answer is 62.8 cubic units