The monthly average high temperatures in degrees Fahrenheit at Daytona Beach can be modeled by where x

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The monthly average high temperatures in degrees Fahrenheit at Daytona Beach can be modeled byimage


where x = 1 corresponds to January and x = 12 represents December. 


(a) Find the average high temperature during March and July. 


(b) Graph fin [0.5,12.5,1] by [60,100,10]. Interpret the graph. 


(c) Estimate graphically and numerically when the average high temperature is 80°F.

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