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26-03-2024
Mathematics

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The total revenue r (in dollars) is directly proportional to the number of units sold x. when 30 units are sold, the total revenue is $450. find a mathematical model that relates the total revenue r to the number of units sold x.
1.r = 15x
2.r =x/15
3.r = 450x
4.r = 450/x

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