Question: the demand for a service is given by the function D(s)=50(200-5s), where s is the price of the service(in cash). at what rate is the

the demand for a service is given by the function D(s)=50(200-5s), where s is the price of the service(in cash). at what rate is the demand changing when the price is set to $30? assume the demand is measure in customers.

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