A coffeeshop determines that it can sell 5000 cups of coffee at a price of $1.50, but for every $1 increase in the price, their sales will decrease by 6000 cups and for every $1 decrease, their sales will increase by 6000 cups.A function giving the revenue earned when the price of coffee is x dollars per cup is R(x)=

An outpatient operating room charges each patient a fixed amount per surgery plus an amount per minute for use. One patient was charged 250 for a 30-minute surgery and another patient was charged 450 for a 90-minute surgery. Determine the linear function that would be used to compute the charges. Use the function to determine the charge when a patient has a 45-minute surgery.

Use a graphing utility to approximate the relative maximum of the function f(x)=4x27x+3.