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Mathematics 13 Online
OpenStudy (anonymous):

The projected monthly sales S (in thousand of units) of lawn mowers ( a seasonal product) are modeled by S=74+3t-40cos(pi(t)/6), where t is the time in months, with t=1 corresponding to January. Graph the sales function over 1 year. PLEASE HELP ME?

OpenStudy (raffle_snaffle):

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