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The function f(x)=7.5+2.5(x-1) can be used to represent the total cost of swimming at a community pool for x hours. What is the rate of

The function f(x)=7.5+2.5(x-1) can be used to represent the total cost of swimming at a community pool for x hours. What is the rate of change of the cost in dollars with respect to the number of hours? Explain. 7.5+2.5times -2.5 T^(2).5 Per hour

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