Apply the binomial theorem.
1. Expand (2x − 6y)8
2. Find the fifth term of (x + 3y)9

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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 hope this is what you were looking for.

see attached graph

the surface area is 124cm²

step-by-step explanation:

length: 4cm

width: 9cm

height:   2cm