During the summer semester, students have a choice of 5 history classes, 2 math classes, and 3 English classes. Each class has 4 morning start times and 3 afternoon start times. Each class and time is equally likely to be chosen. If 14,490 students take one summer class, how many would be expected to attend a math class in the morning?

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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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the first one

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