It is estimated that in china, more than 54,860,000 children take piano lessons.

which shows this number rounded to the nearest ten million?

a.
50,000,000

b.
55,000,000

c.
58,000,000

d.
60,000,000

first, we define the variables:

x: number of years after 1950

f (x): amount of vinyl sold.

then, with the variables defined, we have:

68594 vinyl records were sold in 1958 > f (8) = 68594

91299 vinyl records were sold in 1961 > f (11) = 91299

38720 vinyl records were sold in 1952 > f (2) = 38720

161743 vinyl records were sold in 1967 > f (17) = 161743

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step-by-step explanation: