Owners of an inactive quarry in Australia have decided to

Chapter , Problem 1.3.20

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Owners of an inactive quarry in Australia have decided to resume production. They estimate that it will cost them $10,000 per month to maintain and insure their equipment and that monthly salaries will be $30,000. It costs $800 to mine a ton of rocks. Write a formula that expresses the total cost each month, , as a function of , the number of tons of rock mined per month.

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