Estimate the value of the expression by first rounding each number to the nearest ten thousand.

345,023 + 193,968

a.
about 550,000

b.
about 539,000

c.
about 540,000

d.
about 544,000
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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