The pressure P (in pounds per square foot), in a pipe varies over time. Five times an hour, the pressure oscillates from a low of 50 to a high of 220 and then back to a low of 50. The pressure at time t=0  is 50. Let the function P=f(t) denote the pressure in pipe at time t minutes. find a possible function for the function P=f(t).

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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.