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Mathematics, 30.04.2021 20:00 davestrider404
The total cost c(x) of hiring a dump truck and an operator is described by the function c(x)=300+31x-3.90x^2 , where x is the number of hours worked. Find the number of working hours if c(x)=$220.
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The total cost c(x) of hiring a dump truck and an operator is described by the function c(x)=300+31x...
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