rom 2003 through 2008, the sales R1 (in thousands of dollars) for one of two restaurants owned by the same parent company can be modeled by R1 = 470 − 8t − 0.8t2, t = 3, 4, 5, 6, 7, 8 where t = 3 represents 2003. During the same six-year period, the sales R2 (in thousands of dollars) for the second restaurant can be modeled by R2 = 294 + 0.78t, t = 3, 4, 5, 6, 7, 8. (a) Write a function R3 that represents the total sales of the two restaurants owned by the same parent company. R3 =

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Domain

In simple mathematics terms, a domain is defined as the space on which all the possible inputs for the function will lie. It can also be expressed as a set of departures for the required function.